aaadave
Well-Known Member
need a little math help please. if a 7'' wide wheel has a 20mm positive offset, what would the backspace be? need a wheel with about 4.5'' backspace and dont know squat about millimeters. thanks, dave.
back space
- Thread starter aaadave
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zhandfull
Well-Known Member
Center would be 3.5" +20 is just under an inch plus add a 1/2 inch for rim lip
just under a 5" back spacing
Here is a helpful link
https://www.rsracing.com/tech-wheel.html#backspace
I always better to have more backspacing than not enough in my opinion. You could always use a 1/4 to 1/2 spacer to lessen backspacing as needed providing you have long enough studs.
just under a 5" back spacing
Here is a helpful link
https://www.rsracing.com/tech-wheel.html#backspace
I always better to have more backspacing than not enough in my opinion. You could always use a 1/4 to 1/2 spacer to lessen backspacing as needed providing you have long enough studs.
69MOPE
Well-Known Member
A 7" wheel measures 8" at the outside lips, so center would be 4" ?
69MOPE
Well-Known Member
Plus 20MM (5/8") = 4 5/8 back space?
zhandfull
Well-Known Member
To be precise 20mm=0.79" or between 3/4 & 13/16"
69MOPE
Well-Known Member
aaadave
Well-Known Member
thanks fellas, i found some rims i like at a good price. i've got a 67 b body rear in it now and it's a little over an inch wider than the original 71/4 on each side. a 7'' with no offset worked good on the 71/4, so my thinking is with 4 .50 backspace, it should work the same. is my thinking right?
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