when to put screws in the rims for slicks

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I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

yep I agree with Monte, don't matter how many passes or years you have been doing it you are taking a huge risk for yourself and the car in the other lane. I would refuse to race you.

Well after many months of not agreeing with you. This time with you. Never run a slick with tubes without screws. Valve stem is guranteed to shear off. My buddy that goes as slow as you heared off his valve stems w/o screws.

Find the spot in the rule book that states

Car must run tubes

car must have screws in rims

You goofs still doing dry hops too ?

don't care what it says in the rule book, I will not risk running somebody with tubes and no screws. it's crazy

Then you better go thru tech with everyones car and also, you better check their drivetrain to see if there is a failure going to happen soon there too

Good lord

whatever,most of the guys I race with knows better than to do stupid things like that.

Know better than what ? To disagree with you ?

You really think, if NHRA thought for a 2nd after 60 years that you needed screws, they would not have that in the rule book ?

here it is, if you dont think it's dangerous to have tubes in a wheel with nothing to prevent them from shearing off the valve stem somethingb is wrong with you I don't need nhra or anybody else to tell me it's dangerous. I have seen it happen, lucky the tire went down in the pits not on the track at speed.

Posted By: cjs69mope

Re: when to put screws in the rims for slicks - 01/28/11 02:26 AM

So it is ok to run a tire that the manufacturer recommend a tube for without a tube ?

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/28/11 02:32 AM

The main reason AFAIK for a tube is to keep the air from leaking out ?

My tires are stiff sidewall , and honestly they hardly leak air

I always ran tubes , and screws and bought into the wives tales myself .

Needed ? Maybe ..but so far so good here !!

Posted By: sam64

Re: when to put screws in the rims for slicks - 01/28/11 02:41 AM

bigdad i don't know if you caught a look at the maroon 65 coronet 500 at tulsa ,i think high 9s.well she popped a slick off the bead on launch at mokan,it was the right rear and it launched hard left ending up in the left lane gaurd rail facing the starting line,not a lot of damage but screws would have saved the day there.they were running slicks no tubes.

Attached picture 6442311-mopars032(Small).jpg

Attached picture 6442311-mopars032(Small).jpg

Posted By: fishy340

Re: when to put screws in the rims for slicks - 01/28/11 02:47 AM

I'D SAY 10'S, i think it would look funny on a 13 sec car,,,like the guys that have a parachute on 12 sec cars

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/28/11 02:51 AM

They had bead locks on it in Tulsa

Meh'

I don't know , I find it hard to believe that 5-6 little #10 screws with the tapered end sticking into the tire bead maybe and 1/8 of an inch matters in anyway

But, it is up to those to decide for themselves

My tires have never moved any, none, zero,zip,zilch,nada

But they rims are 15 inches wide and the tires are 16 inches wide so that may matter too

Posted By: Crizila

Re: when to put screws in the rims for slicks - 01/28/11 03:05 AM

There is no answer to this question. Too many variables. Monitor them. When you see them start to slip on the wheel, thats the time to screwem.

Posted By: StrokerAspen

Re: when to put screws in the rims for slicks - 01/28/11 03:14 AM

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What is the rule of thumb of when to put screws in the rims when using slicks ? what ET or power level or always?
Also what if you don't would it cause problems with valve stem on the tubes tearing off ?
thanks

We talked about putting screws in wheels at the Dave Morgan Chassis Seminar that I attended. There are a lot of factors to consider that get over looked. Things I would have never thought of.

For starters, You want to "Index" your screws. Basically, where ever you put a screw on the front side of the wheel, make sure you put the screw on the back of the wheel directly across from the screw on the front of the wheel. If the screws are staggered , this will cause the car to "wonder". Mis-aligned (staggered) screws tend to want to "twist" the tire, as the tire is being pulled from those points at where it is screwed to the rim.

Here is the best picture I could find in my library. SORRY it isn't a Mopar.

You can see that the wrinkle is pulling from where the screw is on the wheel.

Second, how many screws do you put in the wheel? That depends on how big or small you want the "paddle" of the tire to be. Watch some of the high horsepower cars, and the tracks they make out of the whole. you can see the tire is "paddling" the ground. If the screws are further apart, the "paddle" is bigger, the closer the screws are, the smaller the paddle it.

for example....

5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)

10 screws around the diameter of the wheel will make for smaller paddles, but more paddles (9 paddles)

What is the right amount of screws for a car? That I don't know. I personally haven't run screws. My tires seem to hook up just fine with out them.

-Kenny

Posted By: SuperStock68Dart

Re: when to put screws in the rims for slicks - 01/28/11 03:18 AM

Don't use tubes or screws! Beadblast or "rough up" the bead area of your wheels and use a paint brush with Dawn dish soap! Coat the inside of the tire with the soap let dry, mount up and race!!!

Posted By: Thumperdart

Re: when to put screws in the rims for slicks - 01/28/11 03:20 AM

I run screws in every bias ply tire I run(havn`t tried radials yet)so as to keep the tire from slipping on the rim and to help keep the bead seated. No tubes EVER for me and they leak very little when it sits for a couple of weeks. Next step............bead locks; Can`t imagine the high hp 6-second cars NOT running screws or locks.

Posted By: sam64

Re: when to put screws in the rims for slicks - 01/28/11 03:26 AM

yeah they won't have that problem again,i guess it works for those that use em and those that don't.

Posted By: ProSport

Re: when to put screws in the rims for slicks - 01/28/11 03:44 AM

I quit running tubes years ago just because I had 2 valve stems rip off the tube and quickly lose air, could be dangerous. I think this happened because the hole in the wheel didn't properly line up with the valve stem on the tube.

I use Dawn dish soap and no tubes, and I use 8 screws on each side of the wheels. I saw a Mustang wreck many years ago from breaking a bead.

I've heard that running 16 screws on each side of each wheel will help stiffen the sidewall.

Also, I recently read that the screw should thread into the wheel, I didn't know that, the holes in my wheels have always been bigger than the screws so the screws just thread into the tire.

340Rick and Bobsprofab turned me onto a stainless screw that has a nice rounded head and uses a square drive bit, they look clean and can even be polished.

Posted By: BobR

Re: when to put screws in the rims for slicks - 01/28/11 04:33 AM

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I personally do not screw my rims since I stopped using tubes. Is there any reason anymore to screw the tires on unless you're running tubes?

If you have enough power and bite you can knock a bead out and the tire will go flat instantly. The lower the tire pressure the more likely this could happen-especially if you are "driving" the car. That's why faster NHRA cars are required to use beadlock wheels.

Posted By: StrokerAspen

Re: when to put screws in the rims for slicks - 01/28/11 04:40 AM

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I've heard that running 16 screws on each side of each wheel will help stiffen the sidewall.

Also, I recently read that the screw should thread into the wheel, I didn't know that, the holes in my wheels have always been bigger than the screws so the screws just thread into the tire.

340Rick and Bobsprofab turned me onto a stainless screw that has a nice rounded head and uses a square drive bit, they look clean and can even be polished.

Running 16 screws each side probably acts like a stiffer sidewall because you are anchoring the tire to the wheel more often, and closer together. I have notices some of the higher powered small tire cars are running more screws.

That "Square bit" screw you speak of is a Canadian invention

It is called a "Robertson" Head. I really like them, much easier to use with out striping the head of the screw or the end of your bit.

-Kenny

Posted By: Dunnuck Racing

Re: when to put screws in the rims for slicks - 01/28/11 04:43 AM

BEFORE this happens

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6442631-guardrailsmall.bmp (285 downloads)

Posted By: rowin4

Re: when to put screws in the rims for slicks - 01/28/11 04:43 AM

On new slicks I just soap them up with dawn soap and put them on, run them till the side walls are leaking air to the point that air is needed every day, then install the tubes. I prefer to screw them on. If the tubes are installed properly you won't rip out the stems. Use plenty of tire talc inside a dry clean slick, that means all the soap residue must be flushed out or your tube will stick and rip.

Posted By: rebel

Re: when to put screws in the rims for slicks - 01/28/11 05:26 AM

i found if you go racing the day after you fitted your slick, you would see a few inches of movement. if you fitted your slick a couple of weeks before you go racing you'll see very little movement if any. i put this down to the soapy lube they apply to help your slick fit over the rim & slip onto the bead is still wet so it allows movement. i used to screw just the back of my rim as to hide the screws, but in the last 2 seasons we've gotten a bit lazy & haven't bothered to screw at all. i'm not seeing any movement & we still mark the rim to check at each meeting. i'm doing 9.4's at 139 mph with 1.34 60's in a 2950lb car with me in the chair.

Posted By: Sport440

Re: when to put screws in the rims for slicks - 01/28/11 05:54 AM

Brand new mounts will tend to slip. Older mounts will be stuck like glue/weld.

mike

Posted By: Monte_Smith

Re: when to put screws in the rims for slicks - 01/28/11 06:15 AM

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I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

This is dangerous right here. If the tire ever happens to slip on the wheel, it will likely rip the stem out of the tube and you will be in for a rough ride, straight into the wall. I understand you have done it for 6 years. But all it takes is once.

Personally, I think people are nuts, not to anchor the tire to the rim in some way, but thats just me. Last year at an ADRL race, I saw a driver get after an XTF car too hard in the water and knocked both rear tires off the beads. Thats how fast it can happen

Monte

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/28/11 06:44 AM

Do they run screws in the rims in NASCAR ?

Posted By: SB412DUSTER

Re: when to put screws in the rims for slicks - 01/28/11 06:47 AM

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Do they run screws in the rims in NASCAR ?

No they have inner-liners

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/28/11 12:50 PM

I have done it both ways... no screws and no tubes...
I did mark the tire to the stem and mine moved all
the time... thing was I never knew if it went a few
inches or a few turns... then I switched over to running
tubes and screws... this currant set up has yielded
my best 60ft with a 1.19 and I think its the stiffer
side wall....also I get more runs out of a set of tires...
I never get rid of the tires due to being worn out
(tread surface) but the side walls giving out and
when they start going I see the 60 ft going away.
So for me its a better set up all around with tubes
and screws..... my opinion is if you have a big tire
with low pressure you COULD be asking for problems

Posted By: Thor500

Re: when to put screws in the rims for slicks - 01/28/11 02:37 PM

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I personally do not screw my rims since I stopped using tubes. Is there any reason anymore to screw the tires on unless you're running tubes?

I agree, I have a buddy runnin 8.60's in a 2800# car and when he spent $450 a piece on new rims he sure wasn't gonna drill hole in them. We marked the wheel/rim and it moved about 1/2" after the first pass then never again.

Posted By: BobR

Re: when to put screws in the rims for slicks - 01/28/11 03:19 PM

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Quote:

I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

This is dangerous right here. If the tire ever happens to slip on the wheel, it will likely rip the stem out of the tube and you will be in for a rough ride, straight into the wall. I understand you have done it for 6 years. But all it takes is once.

Personally, I think people are nuts, not to anchor the tire to the rim in some way, but thats just me. Last year at an ADRL race, I saw a driver get after an XTF car too hard in the water and knocked both rear tires off the beads. Thats how fast it can happen

Monte

I really don't know what these guys are thinking. Maybe they just haven't seen this stuff happen themselves.

Posted By: BobR

Re: when to put screws in the rims for slicks - 01/28/11 03:20 PM

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Do they run screws in the rims in NASCAR ?

Apples to oranges comparison.

Posted By: Crizila

Re: when to put screws in the rims for slicks - 01/28/11 04:11 PM

Quote:

Quote:

What is the rule of thumb of when to put screws in the rims when using slicks ? what ET or power level or always?
Also what if you don't would it cause problems with valve stem on the tubes tearing off ?
thanks

We talked about putting screws in wheels at the Dave Morgan Chassis Seminar that I attended. There are a lot of factors to consider that get over looked. Things I would have never thought of.

For starters, You want to "Index" your screws. Basically, where ever you put a screw on the front side of the wheel, make sure you put the screw on the back of the wheel directly across from the screw on the front of the wheel. If the screws are staggered , this will cause the car to "wonder". Mis-aligned (staggered) screws tend to want to "twist" the tire, as the tire is being pulled from those points at where it is screwed to the rim.

Here is the best picture I could find in my library. SORRY it isn't a Mopar.

You can see that the wrinkle is pulling from where the screw is on the wheel.

Second, how many screws do you put in the wheel? That depends on how big or small you want the "paddle" of the tire to be. Watch some of the high horsepower cars, and the tracks they make out of the whole. you can see the tire is "paddling" the ground. If the screws are further apart, the "paddle" is bigger, the closer the screws are, the smaller the paddle it.

for example....

5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)

10 screws around the diameter of the wheel will make for smaller paddles, but more paddles (9 paddles)

What is the right amount of screws for a car? That I don't know. I personally haven't run screws. My tires seem to hook up just fine with out them.

-Kenny

Good info. Thanks!

Posted By: runner77_360

Re: when to put screws in the rims for slicks - 01/28/11 04:13 PM

I was told by the tech guy at our track,that if you run with less then 15 lbs of pressure in your slicks you need to use screws.I dont know if that is the rule for nhra but that is what i was told.

Posted By: rebel

Re: when to put screws in the rims for slicks - 01/28/11 08:41 PM

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You can see that the wrinkle is pulling from where the screw is on the wheel.

5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)

this doesn't compare with my pic showing NO screws at all. somethings not right with this theory.

Posted By: Quicktree

Re: when to put screws in the rims for slicks - 01/28/11 09:45 PM

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You can see that the wrinkle is pulling from where the screw is on the wheel.

5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)

this doesn't compare with my pic showing NO screws at all. somethings not right with this theory.

not exactly sure what you are talking about

? what yours shows is a little low on air pressure, but not real bad

Posted By: Quicktree

Re: when to put screws in the rims for slicks - 01/28/11 09:47 PM

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I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

yep I agree with Monte, don't matter how many passes or years you have been doing it you are taking a huge risk for yourself and the car in the other lane. I would refuse to race you.

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/28/11 09:54 PM

Quote:

Quote:

I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

yep I agree with Monte, don't matter how many passes or years you have been doing it you are taking a huge risk for yourself and the car in the other lane. I would refuse to race you.

Find the spot in the rule book that states

Car must run tubes

car must have screws in rims

You goofs still doing dry hops too ?

Posted By: hemicop

Re: when to put screws in the rims for slicks - 01/28/11 09:56 PM

I run a fairly light car (Altered) with 17x33 tires & have run 14x32s on a 3800lb car. I've run tubes & no tubes but NEVER did I not "pin" the tires. As someone said, it only takes one time & you'll REALLY regret it. On both cars they seemed to react better, tires lasted longer and with no tubes the 60' was better. I've always indexed the screws, as mentioned previously, so the only conclusion/ question I can come up with is : For the small time & expense, why WOULDN'T you "pin" the slicks to the rims to avoid any potential problems when there's tons of evidence it actually helps?

Posted By: actionange

Re: when to put screws in the rims for slicks - 01/28/11 10:16 PM

Quote:

Quote:

I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.

yep I agree with Monte, don't matter how many passes or years you have been doing it you are taking a huge risk for yourself and the car in the other lane. I would refuse to race you.

So do you inspect

every car that lines up against you for EVERYTHING that MIGHT POSSIBLY GO WRONG?
I'm estatic to know that I'll never have to race you...maybe my 8 3/4 would break and send shrapnel into your lane too

Posted By: dragram440

Re: when to put screws in the rims for slicks - 01/28/11 10:31 PM

I dont have any screws and I never have, I have been through tech over and over and they have never said anything about rim screws. Even though I marked my tires last year and seemed to turn a couple inches each run. I was told if they turned it would break the beads with no tubes? I had tubes in my old slicks and when I bought my new Hoosier Q.T. pro's at the track the Hoosier dealer said dont run tubes!! I have a 8 3/4 to!!

3800lbs
I will probly screw them for next year.

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/28/11 11:06 PM

I would screw the rim too if I had tubes in
Back in the day, many people just put a hose clamp around the valve stem to keep it from being pulled thru

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 02:31 AM

Guy on the bullet goes 5.14 and has never used screws or bead locks ..

lets argue some more

Posted By: Quicktree

Re: when to put screws in the rims for slicks - 01/29/11 02:37 AM

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Guy on the bullet goes 5.14 and has never used screws or bead locks ..

lets argue some more

geez, what does that have to do with running tubes with out screws

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 02:43 AM

Quote:

Quote:

Guy on the bullet goes 5.14 and has never used screws or bead locks ..

lets argue some more

geez, what does that have to do with running tubes with out screws

The topic at hand was slick / screws

Never was tubes, slicks, screws

And , it was also do tires turn and it turned into the tires come off the rims without screws

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 03:23 AM

I will stand by this

I think people run screws in sidewalls ..

Just because

Do they help performance .. ??

No idea

is is safe ???

There is NO rule that says you need to

When NHRA or IHRA demands it and there a long, long history that says they will never ..

No need

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 03:30 AM

Quote:

I will stand by this

I think people run screws in sidewalls ..

Just because

Do they help performance .. ??

No idea

is is safe ???

There is NO rule that says you need to

When NHRA or IHRA demands it and there a long, long history that says they will never ..

No need

Do what ever floats your boat... I KNOW my tire
cant pop of the beads.... but then again I run
tubes and alot dont believe the tube helps... AGAIN
to each their own

Posted By: poppaj

Re: when to put screws in the rims for slicks - 01/29/11 03:42 AM

I changed to a new set of rear rims last year and was going to put screws in them ( I run my slicks tubeless and always had used screws)The guy at M/T told me Not to put the screws in, he showed me on the new rims they are now putting a safety bead to keep the tires from braking off the outside bead. Look at the new rims there is indeed a hump on the inside. He said the old spun style rims like super tricks definitly needed screws but not the new designs.

Posted By: Quicktree

Re: when to put screws in the rims for slicks - 01/29/11 03:44 AM

Quote:

Quote:

I will stand by this

I think people run screws in sidewalls ..

Just because

Do they help performance .. ??

No idea

is is safe ???

There is NO rule that says you need to

When NHRA or IHRA demands it and there a long, long history that says they will never ..

No need

Do what ever floats your boat... I KNOW my tire
cant pop of the beads.... but then again I run
tubes and alot dont believe the tube helps... AGAIN
to each their own

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 03:47 AM

Quote:

I changed to a new set of rear rims last year and was going to put screws in them ( I run my slicks tubeless and always had used screws)The guy at M/T told me Not to put the screws in, he showed me on the new rims they are now putting a safety bead to keep the tires from braking off the outside bead. Look at the new rims there is indeed a hump on the inside. He said the old spun style rims like super tricks definitly needed screws but not the new designs.

Easy on the dry hops boys !!

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 03:57 AM

Easy on the dry hops boys !!

NEVER done one yet

Posted By: Quicktree

Re: when to put screws in the rims for slicks - 01/29/11 03:59 AM

Quote:

Quote:

I changed to a new set of rear rims last year and was going to put screws in them ( I run my slicks tubeless and always had used screws)The guy at M/T told me Not to put the screws in, he showed me on the new rims they are now putting a safety bead to keep the tires from braking off the outside bead. Look at the new rims there is indeed a hump on the inside. He said the old spun style rims like super tricks definitly needed screws but not the new designs.

Easy on the dry hops boys !!

who does that? I have to admit I did a few in the old days but it's been over 20 years ago.

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 04:03 AM

It means , tires in 2011 are not like they were in ...

And possibly , we have grown to the era that we no longer need to run screws in our rims

Hence , dry hops

Again , there is NO RULES to run screws in the beads

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 04:17 AM

Quote:

It means , tires in 2011 are not like they were in ...

And possibly , we have grown to the era that we no longer need to run screws in our rims

Hence , dry hops

Again , there is NO RULES to run screws in the beads

AGAIN.... what ever floats your boat... its your
car you do with it as you please... I'll take care
of mine

Posted By: Dart1031

Re: when to put screws in the rims for slicks - 01/29/11 04:22 AM

Quote:

The guy at M/T told me Not to put the screws in, he showed me on the new rims they are now putting a safety bead to keep the tires from braking off the outside bead. Look at the new rims there is indeed a hump on the inside.

I bought a car with rims like this on it. But it's only on the outside bead. Guess what, all the rims screws were broke off from the previous owner, lol.

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 04:33 AM

Quote:

Quote:

It means , tires in 2011 are not like they were in ...

And possibly , we have grown to the era that we no longer need to run screws in our rims

Hence , dry hops

Again , there is NO RULES to run screws in the beads

AGAIN.... what ever floats your boat... its your
car you do with it as you please... I'll take care
of mine

It is not about floating my boat

Please , tell me where the rules say you have to run any screws in the rim ?

I just want to abide by the rules

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 04:39 AM

Do drag bikes use screws ??

Oh yah, apples and oranges .. again

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 04:40 AM

Quote:

Quote:

Quote:

It means , tires in 2011 are not like they were in ...

And possibly , we have grown to the era that we no longer need to run screws in our rims

Hence , dry hops

Again , there is NO RULES to run screws in the beads

AGAIN.... what ever floats your boat... its your
car you do with it as you please... I'll take care
of mine

It is not about floating my boat

Please , tell me where the rules say you have to run any screws in the rim ?

I just want to abide by the rules

Guys run bead locks also when not needed... is it
for safety.... it is for me.... I KNOW my tire isnt
popping off the bead on the hit or if my car gets
loose off the line going sideways

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 04:45 AM

Quote:

Quote:

Quote:

Quote:

It means , tires in 2011 are not like they were in ...

And possibly , we have grown to the era that we no longer need to run screws in our rims

Hence , dry hops

Again , there is NO RULES to run screws in the beads

AGAIN.... what ever floats your boat... its your
car you do with it as you please... I'll take care
of mine

It is not about floating my boat

Please , tell me where the rules say you have to run any screws in the rim ?

I just want to abide by the rules

Guys run bead locks also when not needed... is it
for safety.... it is for me.... I KNOW my tire isnt
popping off the bead on the hit or if my car gets
loose off the line going sideways

I would like to hear an engineer tell us just how many lbs of air pressure holds a tire to the bead

I am not but I'm sure it will amaze you

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 04:58 AM

I would like to hear an engineer tell us just how many lbs of air pressure holds a tire to the bead

I am not but I'm sure it will amaze you

Sorry but I have seen tires come off the rims when
the car was sideways ... your not going to see that
occur on mine ... as to what pressure it takes...
it s a matter of which has the greater pressure...
is it the air pressure inside it or the side loading
of the tire going sideways.

Posted By: bigdad

Re: when to put screws in the rims for slicks - 01/29/11 05:04 AM

Quote:

I would like to hear an engineer tell us just how many lbs of air pressure holds a tire to the bead

I am not but I'm sure it will amaze you

You better start screwing those front tires too

then

LAST COMMENT FOR ME ON THIS TOPIC

STAY SAFE FELLAS

Posted By: MR_P_BODY

Re: when to put screws in the rims for slicks - 01/29/11 05:16 AM

Quote:

Quote:

I would like to hear an engineer tell us just how many lbs of air pressure holds a tire to the bead

I am not but I'm sure it will amaze you

Sorry but I have seen tires come off the rims when
the car was sideways ... your not going to see that
occur on mine ... as to what pressure it takes...
it s a matter of which has the greater pressure...
is it the air pressure inside it or the side loading
of the tire going sideways.

You better start screwing those front tires too

then

LAST COMMENT FOR ME ON THIS TOPIC

STAY SAFE FELLAS

Yeah I figured you'd quit now... since the fronts run
about 45# pressure VS my 6.5 to no more than 7#
with 14" across and thats not even figuring the total
surface area thats on the ground so you better figure
out which has the greater load

.... but
your right this IS my last word on this tread

Posted By: Tig

Re: when to put screws in the rims for slicks - 01/29/11 12:36 PM

FWIW I first ran screws on the car when it was running 12's, 29 x 10 Slick on 8 1/2 inch convo pro. @ 10 psi the tyre moved 4 inches on the rim

I've done it ever since.
I run tubes now for the extra sidewall strength, it does improve the 60ft's, at least on my car. If I'd been running tubes back then I have no doubt I would have torn the valve out of the tube.
IMHO for the little time and money it costs it's worth doing for the extra insurance, I've also yet to see a car run slower after screwing the tyre to the rim.

Posted By: Deepockets

Re: when to put screws in the rims for slicks - 01/29/11 07:38 PM

i dont know why some would move and some dont. i mark mine every time they are mounted. i use no lube, just water to seat the bead. the tire is a 11" tread width and 29" tall. i do leave off a brake with a mild 440. best 1/8th of 6.80. the move 1/16 to 1/8 every hit. i'd screew them, but the car is made to look like a street car and i dont want that look. i also run tubes for the time being , since i picked up a screew in one tire. i will also periodicaly deflate the rear tires as to allow the tube to find it's way back where it started.

Posted By: sjs64polara

Re: when to put screws in the rims for slicks - 01/29/11 10:50 PM

Back in the day, my dad always patched tubes and when they got so bad he gave them to us kids to use to float around on the lake.

Posted By: CMcAllister

Re: when to put screws in the rims for slicks - 01/29/11 11:31 PM

Big tire+quick 60'+low pressure=screws.

I've always ran screws. Didn't bother to mark the wheels or any of that. If it might be beneficial and it can't hurt and it doesn't cost anything, I just do it, but that's me.

I know my 60' improved a bit and became more consistent when I went to 16 screws per side.

Posted By: StrokerAspen

Re: when to put screws in the rims for slicks - 01/31/11 05:02 AM

Quote:

Quote:

You can see that the wrinkle is pulling from where the screw is on the wheel.

5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)

this doesn't compare with my pic showing NO screws at all. somethings not right with this theory.

Not sure what your trying to get at here... No your situation won't compare with this set up BECAUSE your not running any screws. Screws serve the purpose of holding the tire where it is, but they also serve the purpose of controlling the "paddle" of the tire.

Posted By: 1967dartgt

Re: when to put screws in the rims for slicks - 01/31/11 05:27 AM

Used to run screws with slicks, now I just glue the drag radials because they use alot more air presure.

Posted By: dartman366

Re: when to put screws in the rims for slicks - 01/31/11 05:37 AM

Years ago I ran slick's and did not screw the rim's, twice I ripped the stem out, finally drilled and screwed the rim's and have not ripped a tube since,

so now you know my opinion.

when to put screws in the rims for slicks