I, like several others, wanted to get away from the stock wheels, add bling, and get a "lip" to give some depth to the rims. Here are some basic things I discovered, owning two XLR's, with custom wheels:
- 20" wheels are about as large as you can get - 22" require very low profile, and rim damage is likely (it has been done)
- 10" wide wheels are as big as you can get on both front and back (I have 9" on front)
- XLR and Corvette are considered "high offset" wheels. Pay close attention to the dimensions on this, especially for the rear rims/tires
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The maximum you can go on the rear tires is 275. Even then, depending on the brand, you can still get some fender rub (inner and/or outer)
- - I have 265 on my 10" wide 20" diameter rims, just to make sure (the 275's I had on my red XLR had minor rubbing on outer and inner fender)
- - Check my garage for some views and examples of fits for these tires/rims
- I bought a staggered 20" rim set meant for a C5, which work great. C6 and C7 are generally too wide
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I guess the best advice I can give is to do a fit check, before you buy. If you can't do that, stay conservative on your sizes, like mentioned above, else you may have a set that you can't use, or will damage your beautiful car!
Check Madcurl for his very detailed story about trying to get the largest tires he could on his car. You can learn a lot on his experiments (search "HRE")
Good luck!!!
