z06 Rims Spacers
07-27-2014, 09:25 PM
#1
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z06 Rims Spacers
I have a 1994 z28 that i had just gotten some 2003 z06 rims for. The front fit perfect but the back will rub. I was wondering if anybody knew what size of off-set spacer i should get and if I'll need to buy longer studs. Any information would help. Thank you.
07-28-2014, 07:21 AM
#2
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Re: z06 Rims Spacers
Are these factory C5 Z06 wheels, or aftermarket reproductions? If repro, what are the width and offset dimensions for the rear wheels?
Factory C5 Z05 wheels are 18x10.5" with a 58mm offset. That produces about an 8.00" backspace. That typically puts the inside edge of the tire into the inner fender liner, and may cause the inside of the rim to catch on the protruding edge of the jounce bumper bracket when the car is jacked up and the axle drops. I run 17x11.0" wheels with a 50mm offset, and that produces a 7.93" backspace. I couldn't use a spacer, since the would put the tire outside the fender, so I hammered the inner fenders, cut the protruding edge off the jounce bumper bracket, and recentered the chassis over the rear axle with an adjustable panhard bar. This is documented in a "sticky" thread at the top of the "Wheels and Tires" forum.
You could use a very thin spacer (1/4") to gain a bit of clearance, but the wheels would still sit a bit deep in the wheel wells. Max spacer would be 1/2" and when you go that wide, you need to look for an "adapter" that bolts to your stock hubs, and provides a second set of studs for the wheels to bolt to.
With the 1/4" spacer, you would have to check to see how much of the stud threads engage the threads of the lug nuts. You have to have at least 12mm (a shade less than 1/2") of thread engagement.
Factory C5 Z05 wheels are 18x10.5" with a 58mm offset. That produces about an 8.00" backspace. That typically puts the inside edge of the tire into the inner fender liner, and may cause the inside of the rim to catch on the protruding edge of the jounce bumper bracket when the car is jacked up and the axle drops. I run 17x11.0" wheels with a 50mm offset, and that produces a 7.93" backspace. I couldn't use a spacer, since the would put the tire outside the fender, so I hammered the inner fenders, cut the protruding edge off the jounce bumper bracket, and recentered the chassis over the rear axle with an adjustable panhard bar. This is documented in a "sticky" thread at the top of the "Wheels and Tires" forum.
You could use a very thin spacer (1/4") to gain a bit of clearance, but the wheels would still sit a bit deep in the wheel wells. Max spacer would be 1/2" and when you go that wide, you need to look for an "adapter" that bolts to your stock hubs, and provides a second set of studs for the wheels to bolt to.
With the 1/4" spacer, you would have to check to see how much of the stud threads engage the threads of the lug nuts. You have to have at least 12mm (a shade less than 1/2") of thread engagement.
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