Originally posted by xcanuk:
I finally took a ruler to the 7" rims, and came up with 5.5" .. I did some number crunching, and it does indeed work out to 5.5".
Example
Known offset of stock rims is +40, listed in the manual,
AR 767 7" rims is listed as 0 Offset/3.95 B.S.
40(difference in offset) divided by 25.4 conversion = 1.57"
3.95 + 1.57 = 5.52 Backspace of stock rims.
Not anything important.. but something when comparing to 8" rims.
So then, what is the backspacing for the stock 17x8 wheels (as I have)??? 5.25? 5.5? more?
Yes, I know I could go and remove a wheel and take the measurements myself but I haven't had the time.
Thanks for any info.
Also, there's an AR wheel I'm interested in. It has 19mm offset with a 5.5" backspacing.
By attempting to emulate your calculations...
40-19 = 21 divided by 25.4 = .83"
5.5 + .83 = 6.33"
Therefore, if factory backspacing is, for example, 5.5" then these wheels (at 6.33") will not fit. Am I doing this correct?