what backspacing needed

07-27-2006, 10:49 AM

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what backspacing needed

what backspacing is needed for prostars for the front being 15x3 and back being 15x10? Thanks guys!!

07-27-2006, 12:15 PM

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15x10 7.5" B.s. And 15x3 1.75 B.s. Or 2.25 B.s.