Wheel measurements... good info - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 52 (permalink) Old Feb 1st, 05, 06:30 AM Thread Starter
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Post Wheel measurements... good info

Thought some of you might find this good information...

http://www.rsracing.com/tech-wheel.html

http://www.miata.net/garage/tirecalc.html

http://www.1010tires.com/TireSizeCalculator.asp
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Last edited by clwilcox33; Jan 19th, 10 at 12:33 PM. Reason: Adding a link for tire sizing.
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post #2 of 52 (permalink) Old Feb 1st, 05, 12:53 PM
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Looks good Dennis.

68 Camaro~LSx ~all motor
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post #3 of 52 (permalink) Old Feb 1st, 05, 01:34 PM
 
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Thanks for the link. Very informative.

J. Garcia
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post #4 of 52 (permalink) Old Feb 2nd, 05, 06:18 AM
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Dennis, Maybe you should make it a "schticky"...

JD

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post #5 of 52 (permalink) Old Feb 2nd, 05, 11:15 AM Thread Starter
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post #6 of 52 (permalink) Old Feb 2nd, 05, 05:02 PM
 
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Cool, thanks for the info. Definetly something that i can use [img]graemlins/thumbsup.gif[/img]
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post #7 of 52 (permalink) Old Feb 23rd, 05, 09:50 AM
 
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heys guys i have a 97 camaro rs and i was going to buy some black Z-06 rims but i dont know what size to buy that would fit my car perfectly. I was wanting to get some 18*9 1/2s. Ur help would be greatly apprecciated.
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post #8 of 52 (permalink) Old Mar 1st, 05, 07:48 PM
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heres another one:

http://www.oldsmobility.com/fitting-wheels.htm

Driving a #s-matching Z in the rain..... and lovin' it....
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post #9 of 52 (permalink) Old Dec 16th, 05, 06:30 PM
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Re: wheel measurments... good info

I found this note on the site www.1010tires.com/TireSizeCalculator.asp

"When changing tire sizes, we recommend staying within 3% of the diameter of the original tire. Any more than this and you face the risk of brake failure."

Does anyone understand this note on possible brake failure?
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post #10 of 52 (permalink) Old Dec 17th, 05, 12:42 AM
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Re: wheel measurments... good info

Quote:
Originally Posted by Dave H.
I found this note on the site www.1010tires.com/TireSizeCalculator.asp

"When changing tire sizes, we recommend staying within 3% of the diameter of the original tire. Any more than this and you face the risk of brake failure."

Does anyone understand this note on possible brake failure?
It's more an issues with MAJOR upsizing on SUV's. That are putting on 20's-22's, or 4x4's going to 40" tires or more. The rolling mass of the wheel/tire combo becomes too heavy for the stock brakes. Problems like brake fade, warping rotors, extremely long braking distances. If you have stock discs, or you've upgraded to big brakes, then it's not really an issue.


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post #11 of 52 (permalink) Old Dec 17th, 05, 09:54 AM Thread Starter
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Re: wheel measurments... good info

Actually it's something to consider anytime you plus size wheels and tires. It's all about leverage, remember the bicycle wheel example from school days? The area closest to the hub moves slower than the area out by the rim. I'm not going to do the math but a mark on the rim has to travel a lot farther than a mark by the axle flange travels, they both only make one revolution and start and stop at the same time.

It takes more braking power to stop the taller wheel and plus sizing can put you in a position where your existing brakes are not enough. Weight can come into play as well and taller wheels can often mean more unsprung (not carried by the cars suspension) weight. In acceleration loosing 10lbs of unsprung weight is equal to 100lbs of sprung weight. It works the same for braking, 10 lbs extra in wheels and tires is like throwing 100lbs in the trunk.

For the website though, it's a disclaimer so if you put 20's on your car and have brake issues they are off the hook. 3% on a factory 26" - 31" tall tire is less than a 1" increase. Using my Colorado as an example it has 31" tall tires from the factory but another option package includes 28" tall tires and there is even a 26" or 27" tall tire option. The vehicle's brakes are fine with the 32" tall tires I installed.

Take a stock drum brake 1st gen that came with tires in the 25" - 26" tall range and put 28" tall tires all around and you will run into braking issues... Remember though you could run 20" wheels on it if the tires only had 3" sidewalls as the overall height ends up being 26"...

...Dennis

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post #12 of 52 (permalink) Old Dec 17th, 05, 04:12 PM
 
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Re: wheel measurments... good info

this is one of my favorites
http://www.bfgoodrichtires.com/assets/pdf/radial_ta.pdf
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post #13 of 52 (permalink) Old Jan 8th, 06, 08:15 AM
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Re: wheel measurments... good info

thanks dennis
this is some really good info
69z28 rs x33
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post #14 of 52 (permalink) Old Jun 14th, 06, 11:59 AM
 
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Re: wheel measurments... good info

This sin't just about the extra weight of upsizing wheels/tires. More importantly on cars with ABS brake systems, this can cause failure of this system, do to the fact that it is computer programmed to run off your stock tire height. And of course it messes with the vehicles computer as far as trip computer, odometer, gearing, traction contol and can also lead to transmission failures.
Hope that answers some of your questions.



Quote:
Originally Posted by Dave H.
I found this note on the site www.1010tires.com/TireSizeCalculator.asp

"When changing tire sizes, we recommend staying within 3% of the diameter of the original tire. Any more than this and you face the risk of brake failure."

Does anyone understand this note on possible brake failure?
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post #15 of 52 (permalink) Old Nov 5th, 06, 04:59 AM
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Re: wheel measurments... good info

Another good site with backspacing info is

http://www.earlywheel.com/choosing.html

Kev
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