UPS man has got to love me by now
07-29-2016, 06:21 PM
#21
Height; revolution ratio F/R as I understand...
I'm somewhat confused on how you think it will mess anything up. 275/35/18 is the stock size from GM on the front. If we are talking rears the stock size from GM is 325/30/19 which broken down into inches is exactly 26.4 inches wide by 12.08 by 19. My 345's equal out to 27.0 by 13.58 by 19. By your logic you're saying 0.06's on an inch will screw up my AH/TC ? or the 1.50 in height
07-29-2016, 06:33 PM
#22
Team Owner
Tire Rack has 'revs/mile' for tires on their site. Simple to check the front to rear ratio of the stock size tires and then get very close to that with the new tires.
07-29-2016, 07:00 PM
#23
Le Mans Master
It is circumference (or rolling circumference) that you need to compare, front to back. Not width or other dimensions. The ABS/TC/AH systems are all operating from a primary sensor, the 4 wheel sensors and the yaw rate steering sensor. There is a "slip" tolerance built in, measured in the form of a percentage.
If you change wheel sizes and the rolling circumferences differ by an amount that exceeds the tolerance, these systems then interpret that the car is in a slide (or wheel spin). TC will try to correct it. If it cannot, then it will set a CEL.
You should use a tire size chart, something like this one that will give you the revs/mile calc. front to rear. I don't know what the % tolerance is on a C6.
https://tiresize.com/calculator/
If you change wheel sizes and the rolling circumferences differ by an amount that exceeds the tolerance, these systems then interpret that the car is in a slide (or wheel spin). TC will try to correct it. If it cannot, then it will set a CEL.
You should use a tire size chart, something like this one that will give you the revs/mile calc. front to rear. I don't know what the % tolerance is on a C6.
https://tiresize.com/calculator/
Last edited by BlindSpot; 07-29-2016 at 07:01 PM.