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Originally Posted by pig_iron
Howdy ZR1 enthusiasts. I have a few questions about the car that I can't seem to get answered anywhere else. Firstly, I have a 91 Z and I want to upgrade to 18 or possibly 20 inch wheels. What would be proper backspacing in the rear to enlarge to 12 inches wide? I want a good look that fills out the fenders but doesn't exceed them or cause rubbing. Also, with the addition of a larger wheel, it may cause an unsightly change in ride height. Is it possible to lower the car TASTEFULLY (1-1.5 inches) to compliment the larger wheels? I have looked for an aftermarket lowering spring for the ZR1 or even just the C4 and I cannot find a manufacturer anywhere.
Thanks for any info.
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contact John @ CCW.
www.ccwheel.com he has some really nice billet wheels in 18" or 19" stay away from 20s. you don't need new springs to lower the car. you get longer bolts for the back, in the front you remove the "shims" which is much more involved as you need to pull the spring to get at them. If you are going that far I would definitely consider coil overs as you can then tailor the spring rates and they minimize the "cross talk" that cause the rear end to get a little twitchy around bumpy corners.
good luck!!!