c5 offset question
Thread Starter
Heel & Toe
Joined: May 2018
Posts: 20
Likes: 2
They do not match the C5 Factory offsets but they should be OK.
Factory offsets below:
Backspace/offset dimensions are as follows:
C5 (coupe/vert):
Front 17x8.5", 58mm offset = 7.03" backspace
Rear 18x9.5" 65mm offset = 7.81" backspace
C5 Z06:
Front 17x9.5", 54mm offset = 7.38" backspace
Rear 18x10.5", 58mm offset = 8.03" backspace
C6 (coupe/vert):
Front 18x8.5", 56mm offset = 6.95" backspace
Rear 19x10", 79mm offset = 8.61" backspace
C6 Z06 and C6 GrandSport:
Front 18x9.5", 40mm offset = 6.82" backspace
Rear 19x12", 59mm offset = 8.82" backspace
C6 ZR1
Front 19x10 40mm offset = 7.22" backspace
Rear 20x12 59mm offset - 8.82" backspace
C5 and C6 wheel circle:
5 on 4.75" (120.65MM)
Center hub dia. 70.3mm
The fronts you want to order will stick out about 0.35" more than the factory front wheels and the rears will stick out about 0.60" more than the factory rear wheels. Assumes you have coupe or vert wheels now and not Z06 wheels.
Factory offsets below:
Backspace/offset dimensions are as follows:
C5 (coupe/vert):
Front 17x8.5", 58mm offset = 7.03" backspace
Rear 18x9.5" 65mm offset = 7.81" backspace
C5 Z06:
Front 17x9.5", 54mm offset = 7.38" backspace
Rear 18x10.5", 58mm offset = 8.03" backspace
C6 (coupe/vert):
Front 18x8.5", 56mm offset = 6.95" backspace
Rear 19x10", 79mm offset = 8.61" backspace
C6 Z06 and C6 GrandSport:
Front 18x9.5", 40mm offset = 6.82" backspace
Rear 19x12", 59mm offset = 8.82" backspace
C6 ZR1
Front 19x10 40mm offset = 7.22" backspace
Rear 20x12 59mm offset - 8.82" backspace
C5 and C6 wheel circle:
5 on 4.75" (120.65MM)
Center hub dia. 70.3mm
The fronts you want to order will stick out about 0.35" more than the factory front wheels and the rears will stick out about 0.60" more than the factory rear wheels. Assumes you have coupe or vert wheels now and not Z06 wheels.
