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Old 09-15-2012, 10:41 PM  
VIR Specialist

JusticePete's Avatar
Drives: Camaro Justice
Join Date: Jun 2007
Location: Virginia
Posts: 20,249
Wheels and Tires

Wheels and Tires

The wheels and tires are too big in circumference and diameter. We don't understand why GM used a set of tires and wheels better suited to an SUV. Actually we do understand and blame the designers and the public that love the look of these SUV tires and wheels. They love these big wheels and tires so much they want BIGGER wheels and tires. Our experience with the package is that the Camaro will be a much better car with smaller diameter wheels and tires that weigh less -- a lot less. It will get out of the hole better. It will stop better. It will not be as silky smooth, but it will be better. That is why we have selected Forgeline light weight racing wheels in a 19 x 10.5 size. The Forgelines will be covered with Bridgestone RE-11 305 30 19 performance tires. The RE-11 is arguably the finest street legal performance tire available. The combination of tire and wheels reduce the unsprung weight by 34 pounds while dramatically increasing the tire contact patch. The increase in traction combined with the decrease in weight improves everything from acceleration to handling to braking.

The 305s look good from most any angle.

This is not a fitment that is in compliance with the OEM requirements. The sticker in the door shows a Maximum Load of 732 pounds plus the vehicle weight of approximately 3,900 pounds equaling roughly 4,600 pounds. The Load Rating stamped on the OEM tires is over 8,000 pounds. Speaking off the record with different OEM engineers Pedders is comfortable with the over 6,000 pound Load rating of our RE11 tires. We have suggested to GM marketing that they consider releasing an informational statement with an alternative range of acceptable wheel and tire sizes to the truck load ratings on the OEM package. Most wheel and tire shops will not sell or install a package with a lower load rating than shown on the OEM tires for liability reasons. Bridgestone, General Motors and Pedders do NOT recommend this tire and wheel package for your vehicle. This vehicle is built for Pedders to test the limits of the suspension design of OEM and Pedders components. Should GM modify their position on the Load Rating for Camaro tires, we may be able to make this our official corporate recommendation. Until , if or when that occurs all we can say is this is the best tire and wheel combination we have found for our testing and track use.

There is more to our choice of wheels and tires. Talk to any engineer with race experience and from a sheet of paper they can tell you why a Camaro in OEM trim suffers from significant understeer. The tale of the tape tells the story.

Front Track 63.7"
Rear Track 64.1'
Front Wheel 20 x 8
Rear Wheel 20 x 9
Front Tire P245/45ZR20
Rear Tire P275/40 ZR20
Weight Balance 52/48
Front Sway Bar Diameter 24mm
Rear Sway Bar Diameter 23mm

The understeer is built into the vehicle from the ground up. Pedders felt it necessary to bring out the true potential of the ZETA II Camaro to alter the car from the ground up.

Front Track 65.7"
Rear Track 64.6'
Front Wheel 19 x 10.5
Rear Wheel 19 x 10.5
Front Tire 305/30/19
Rear Tire 305/30/19
Weight Balance 52/48
Front Sway Bar Diameter 27mm
Rear Sway Bar Diameter 32mm

When the dimensional changes are combined with upgraded suspension components the Camaro become a virtual Supercar. We are at 141 MPH in 4th gear pulling effortlessly to redline. 175 MPH is the fastest we have run the car and we can tell you she was not breathing hard ready and was ready for more. Only a fool will find the limits of a Pedderised Camaro on public road ways and depending on the race track, given there is no cage in the car, we doubt we will ever take our Camaro to the limit ANYWHERE.

Last edited by JusticePete; 05-23-2013 at 04:58 PM.
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