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Old 09-24-2005, 06:18 AM
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George Schweikle
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Join Date: Jan 2004
Location: Lexington, KY
Posts: 1,681
Hi Murray,

Before considering different size tires, be sure you know the overall dimensions. Do a search for "Tire Size Calculators" on the web; one of these will allow you to compare tire diameters, which will affect your overall gearing. Also, check the tire manufacturers sites for recommended rim size (or use the excellent Tire Rack site). A 6.00 rim sounds too narrow for a 225 section tire. I use 225/45x15 Hoosiers on a 8.50 wide rim, however, I cut the wheel openings to provide clearance.

My 8.50 wheels have a 4.25 in. backspace, placing the inside of the rim in the same location as a stock wheel. With a 22.90 overall diameter, the outside edge of the tire rubs on the back of the front wheel well with the steering at full lock. I also use 1/4 in. spacers at the back to eliminate a slight rub on the inside of the wheel well.

And... check your owners manual, S4 spiders do NOT have ABS.

Quote:
Originally Posted by msiert
If I go down to a 15x6 wheel will the 35 mm offset work? Your right no reason to go wider plus all the tires I am look at jump from 205 to 225.

Thank you,

Murray
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George Schweikle
1976 Spider (Dedicated Autocrosser)
1991 Spider Veloce (Retirement cruiser)
Scuderia Non Originale
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