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Old 11-11-2020, 06:19 PM   #1
lt4camaro


 
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Drives: 2021 LT1 10 speed auto
Join Date: May 2013
Location: Connecticut
Posts: 2,355
Rear tire size question

I am getting all my tweaks in order for my 2021 LT1 10 speed auto . The LT1 has a square tire size of 245 40 20, these tires are 27.7 inches tall. I have obtained a pair of 20x9 2011 camaro wheels off the rear of a SS to use with a 255 35 20 nitto nt05 on the rear which is 27 inches tall. That equates to a 2.5% difference. I should be getting a small gear ratio advantage , stock gear is 2.77, now it should be 2.83. Main question is should I expect any issues with tire diameter being less than a 3% difference? I plan on driving to and from the drag strip and occasionally on the road with these rear tires.
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