1971 demon tire sizes for 15” wheels

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Uncle Ben

Uncle Ben

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I know this has been asked a million times but im not finding a straight answer. I have vision wheels 15x7 4.25”bs on fron and 15x8 on rear. I got the front tires free and bought the rears myself but im having clearance issues on the front fenders and the rears are way too tight for comfort. I honestly want a tire package that would be great for autocross with plenty of clearance. Ill be changing the rear leafs out for hotchkiss most likely. I have QA1 parts everywhere else. Thanks everyone.
 
225/60/15 will probably fit with 15x7 rims with 4.25 backspacing up front

If you really want to autocross, you should look into 17" or 18" that you can get good tires for.
 
Uncle Ben said:
Rear 255/70/15

Front 215/70/15
Click to expand...
255/70R15? that's like 29 inch diameter a bit too big. 28 inches is what I would consider max.
215/70R15 in almost 27 inches. You do not want to exceed 26 inches diameter in the front.

So the sizes I've used before on 15 inch rims that worked with good effect are:
255/60R15 in the rear (27 inch diameter)
225/60R15 in the front (25.5 inch diameter)

Also I believe 4.25 inch is the max backspace in the front for 15 in rims.

I'm now using 17 inch rims. 17X8 in the front and 17X9 in the rear.
 
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