largest tire on the front of a 68-70 B-Body

Posted By: charger

largest tire on the front of a 68-70 B-Body - 04/12/11 07:12 PM

What's the largest tire you've run or seen run without rubbing..

I have a set of 255/60-15's I wanted to put on the front temporarily while my 235/60-15's get new rims on them. Any trouble?

Posted By: 70rrclone

Re: largest tire on the front of a 68-70 B-Body - 04/12/11 07:28 PM

i have 245/60's on the fron of my 70 Sat with no issues. when these wear out i am going to the 255/60. there is plenty of room.

Shane

Posted By: charger

Re: largest tire on the front of a 68-70 B-Body - 04/12/11 07:31 PM

oh yeah, these are for a '68 Satellite

Posted By: Kern Dog

Re: largest tire on the front of a 68-70 B-Body - 04/12/11 08:19 PM

How about a 275-40-18?

Attached picture 6581863-00000007.JPG

Posted By: 6PAX

Re: largest tire on the front of a 68-70 B-Body - 04/12/11 08:23 PM

I have 255-60-15 tires on 15x7 rallys on the front of my 70 GTX and I don't have any rubbing issues.

Posted By: topside

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 01:05 AM

I have 265/50R15s on 15x8 4.5BS (Ramcharger) steelies on mine. And it's lowered a bit. Never a rub.

Posted By: Pool Fixer

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 02:59 AM

on my charger, I used to run 255/50/16 and now I run 255/45/17. no issues.

Posted By: autoxcuda

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 04:20 AM

I'd think 68-70 Chargers will have different about of room in different places than 68-70 Satelites and Coronets.

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 06:52 AM

255x60x15" on the '69 R/T convertible. Every once in awhile they lightly catch the top of the wheel opening molding, but my T-bars are fairly soft.

Posted By: autoxcuda

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 07:39 AM

Quote:

255x60x15" on the '69 R/T convertible. Every once in awhile they lightly catch the top of the wheel opening molding, but my T-bars are fairly soft.

What was the rims size and the backspacing.

Need to know this for every application.

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 10:06 PM

7" rims, and (I think) 3.5" backspacing.

Posted By: A12

Re: largest tire on the front of a 68-70 B-Body - 04/13/11 11:06 PM

All you need to do is check the diameter of a G70-15 tire that came on the '69 A12's because they had to add a .250" shim under the bump stop to prevent it hitting "something" by the engineering drawings/specs.........that doesn't answer how wide the tire can be (if that's what you're asking) but as far as "what's the tallest tire you can put on a '68-'70 B-body to engineering concerns then a G70-15 or maybe a 15" 78-series tire should give you a ballpark answer.

MikeR

Posted By: Pool Fixer

Re: largest tire on the front of a 68-70 B-Body - 04/14/11 01:34 AM

Quote:

on my charger, I used to run 255/50/16 and now I run 255/45/17. no issues.

the 16x8" wheels had a 4.5" backspace, the 17x8 wheels also have 4.5"

Posted By: Keith Black®

Re: largest tire on the front of a 68-70 B-Body - 04/14/11 01:37 AM

Quote:

How about a 275-40-18?

me too

Posted By: charger RTSE

Re: largest tire on the front of a 68-70 B-Body - 04/14/11 10:36 AM

245 60 15 on front of 70 charger 15 by 8 inch rims

Posted By: charger

Re: largest tire on the front of a 68-70 B-Body - 04/14/11 01:30 PM

Update: the 255/50-15 fit fine on the front and looks fine with 295/50-15 on the back

Posted By: 68KillerBee

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 03:09 AM

Quote:

Update: the 255/50-15 fit fine on the front and looks fine with 295/50-15 on the back

Pictures please! Will need new front wheels soon so trying to figure out what looks good. I have the 15x10 on the back w/ 295-50's.

Posted By: topside

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 04:12 AM

Here's my RR with the 265/50R15 fronts, 295/50R15 rears, all on same 15x8 Ramcharger steelies, 4.5 BS.
If I had it to do over again, I'd go with 60 series for more sidewall height; the 50s look a bit slim in side profile to me. Also, the 15x8s are a bit narrow for a 295 tire.
He's a bit of a workout when parallel parking, with that big-valve-cover lump in the nose and manual steering, if that matters, but I do like the way they fill up the width of the wheelwells.

Attached picture 6585538-hemiSPIR.jpg

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 05:16 AM

Went to the garage and took this photo of the passenger front tire at full right lock.
This is the 255x60x15" tires:

Attached picture 6585617-tire2.jpg

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 05:24 AM

You can see where the tire has caught the wheel opening molding, this usually only happens at high speed cornering. Topside's car looks like it sits higher than my car or 68killerbees car? I'd like to see the clearance on frankendusters Charger with the wheels at full lock? It looks like those rims may have more back space?
Here is a close up from my avatar pic:

Attached picture 6585620-tire1.jpg

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 05:57 AM

Tire Heights from those listed in this post:
255x60x15 = 25.04" tall
245x60x15 = 26.57"
255x60x15 = 27.05"
275x40x18 = 26.66"
265x50x15 = 25.43"

Doing the theoretical tire height math, the 255x60x15" tire is the tallest tire. I thought the 275x40x18 would be? The 255x50x15" tire is 2" shorter than the 255x60x15 tire. Looks like the tire profile makes a big difference.

Posted By: KY Charger

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 10:37 AM

I've got 245-45-17 on the front of a 68 Charger

Posted By: SNK-EYZ

Re: largest tire on the front of a 68-70 B-Body - 04/15/11 11:01 AM

255/60R15's will fit on the front.
The wheel offset is the main concern.
If you use 15x7 with a 4.25 rear spacing you should be fine.

That what's on the front of this GTX I used to own.
It had 275/60r15'son the rear.

Posted By: MoparMarq

Re: largest tire on the front of a 68-70 B-Body - 04/16/11 06:44 AM

Quote:

255/60R15's will fit on the front.
The wheel offset is the main concern.
If you use 15x7 with a 4.25 rear spacing you should be fine.

That what's on the front of this GTX I used to own.
It had 275/60r15'son the rear.

Sorry to hijack the post.
A guy is coming over this weekend to perhaps buy a set of 15x8 AR200S's with 245/50s on them. The BS is 3-3/4". His car is a '68 GTX. Is he gonna have a problem? The car is same as OP's Q, so I figured it was a legit question...

Posted By: 451Mopar

Re: largest tire on the front of a 68-70 B-Body - 04/16/11 07:02 AM

245x50x15 is a pretty short tire, only 24.65' tall.
On my car, width is not the problem, it is the tire height, and it really is not much of a problem. I think with a bit more backspace / offset I could fit a really large tire.