For mm to inches divide by 25.4. ie: 30mm (offset) / 25.4 = 1.18".
For the rim add 1" (1/2" each side) for the bead /lip area. ie: 8" + 1" = 9", then
divide by 2 = 4.5"
Add 1.18"(offset) + 4.5" (rim) = 5.68" backspacing
The 9.5" with 25mm offset would be 6.23" backspacing (5.25" + .98").
Does that help?
Larry.
Last edited by whitess; 11-15-2008 at 10:40 AM.
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