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RX-7 1st Gen Specific (1979-85) RX-7 1979-85 Discussion including performance modifications and technical support sections

 
 
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Old 04-01-2015, 01:08 PM   #5
GySgtFrank
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Quote:
Originally Posted by ran83 View Post
I appreciate it gentlemen.... If you have any information I am willing to take it in.
This question is so dependent on wheel/tire diameter and width that it is impossible to give you an answer that wouldn't be likely to leave you buying something that wouldn't work. The best bet is to measure what you have and do the calculations yourself to get what you actually need instead of a generalized answer. If you need to push the wheel out add offset and vice versa. (measure width at the sidewall "bulge") An inch equals 25.4 mm which is what most offset is figured in.

Your existing wheels should be marked with the offset, but if they're not you can use straight edges across the wheel to measure from the inside wheel mounting surface to the tire bead and the width of the wheel. (the bead lip isn't included in normal width figures) With the mounting surface dead center of the wheel you have a zero offset wheel. Outward of center is positive offset, (most common) and inward is negative offset.

On a side note the closer to zero your offset is, the less strain you will have on your wheels and bearings while cornering. Hope that is helpful.
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1988 N/A SE 2+2, dead stock and staying that way.
1979 SA22C stock? Not so much.
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