Re: How many here are weight concious on wheel tire combo
[Re: jcc]
#1828641
05/17/15 05:38 PM
05/17/15 05:38 PM
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Joined: Jan 2003
Posts: 27,548 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,548
So Cal
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I put as mentioned above more effort in rotational mass then unsprung, seems bigger bang for the buck, every car has to accelerate and stop, put hitting bumps is more of a choice?
Which means big rims, tires, and/or rotors beyond the application's needs, has a performance downside. Problem is there are no good 15" tires and even 16" and 17" are getting sparce. I'm about being forced now into 18" rims because i'm worried about 275/40/17 losing selection soon.
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Re: How many here are weight concious on wheel tire combo
[Re: PHJ426]
#1828685
05/17/15 07:19 PM
05/17/15 07:19 PM
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Joined: Jan 2003
Posts: 27,548 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,548
So Cal
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Does a 3000# car really require a 275 tire? I'm at 3209 lbs on digital scales, so far. I think new vettes and vipers have as wide front tires in max handling packages. And they have better weight balence and lower cg.
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Re: How many here are weight concious on wheel tire combo
[Re: PHJ426]
#1828742
05/17/15 08:48 PM
05/17/15 08:48 PM
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Joined: Jan 2003
Posts: 27,548 So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,548
So Cal
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C4 Corvette is 3200# with a really great distribution 51F/49R
Those are on 255/50R16 and there are plenty of tires in that size.
Maybe that is why Tom Quad liked that tire size squared up on the Black N Blue Charger and the AAR
I'm 3209 with 57.28F/42.72R distribution. That's 206 lbs more on the front wheels. I bet the difference is even a little greater with driver. 90's Camaro SS with a more ponycar weight distribution ran 275/40/17's. And we're up to C7 Corvettes that have Michelin Pilot Sport P285/30ZR19 front and 335/25ZR20 rear tires on the Z06 versions. With all kinds of lightweight components to reduce unsprung weight. Even C4's have aluminum spindles and control arms.
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Re: How many here are weight concious on wheel tire combo
[Re: PHJ426]
#1828970
05/18/15 03:44 AM
05/18/15 03:44 AM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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I tried to be weight conscience when I was choosing wheels and tires. Since I didn't want to go with offset shackles just yet, I tried sticking some 255/40/18's under there. Probably the stickiest tire that comes in that are the Michelin Super Sports which are a 300TW tire. From what I understand is they're still a pretty good tire and the most lightweight when Hot Rod did the Hotchkis Taxi/Tirerack comparison. Unfortunately, there was really only one set of wheels that fit my application the best so I bought them. They're M/T SC-5's. They're very robust wheels so I'd imagine they'd weigh about 22-23 lbs. I was really shooting for Enkei's which would have saved me about 3-4 lbs a wheel. Tirerack says the tires weight about 25 lbs so I'm at about 48 lbs per corner of unsprung weight not including the brakes (big discs so there's some more into the mix).
Last edited by MuuMuu101; 05/18/15 03:45 AM.
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Re: How many here are weight concious on wheel tire combo
[Re: PHJ426]
#1829249
05/18/15 03:37 PM
05/18/15 03:37 PM
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Joined: Jan 2010
Posts: 1,443 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,443
NW Chicago suburban area
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Paul -- the combo of light weight rims/tires ads up to the micro-seconds if/when pushing it to the limits on timed competition runs.. the driver still has the final limits pending skill/experience and overall car setup. If/when possible and the budget allows... always go for the lightest rims... light weight rims typically increase in cost... there's some serious choices available if someone really wants light weight rims... The most serious competition racers will spend those big bucks ... as it always comes to the overall package... everything continues to add up towards that package.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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Re: How many here are weight concious on wheel tire combo
[Re: RylisPro]
#1829623
05/18/15 10:53 PM
05/18/15 10:53 PM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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I read an article on one of road race magazine a while back where they tested a wheel that was lightened as much as possible vs. a normal wheel the particular wheel company sold on the market. The result was that even though the wheel was lighter on all four corners, the lap time was slower due to the additional deflection. The normal wheel was heavier but was also stiffer and was able to handle the loads better which led to a faster laptime. All the hard core road race S2000 drivers on the other forum I go on all use the widest wheel possible that can fit on all corners. Even though it is heavier, they are able to produce faster laps as well. We tried that before with our SAE Baja car. The wheels we used were smooth-faced, spoke-less wheels. We gun drilled about six 2-3" holes into it to save weight. Although, it did make the car a little faster, those specific wheels were prone to bending and failed much quicker. That's why we kept the old design wheel and didn't modify it. The manufacturing process of wheels make a difference too when choosing a wheel. Some of the high dollar wheels are expensive as they are due to the process. From my experience, same material, a Forged wheel will have better mechanical properties than a Cast wheel. As far as I know, Enkei's are all cast, but what makes them more superior vs other cast wheels is the material they use.
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Re: How many here are weight concious on wheel tire combo
[Re: AndyF]
#1829624
05/18/15 10:53 PM
05/18/15 10:53 PM
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Joined: Nov 2008
Posts: 1,491 Lethbridge, AB, Canada
dangina
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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I put Fikse rims on my '65 Coronet because they were light and strong. Not sure it really matters much since my car is a garage lizard, but the Fiske rims do look really cool sitting out there in the garage! and pricey!!!
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