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Old 03-01-2007
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back-spacing help needed

ok so as some of you guys might know i got some new rims recently but i somehow failed to think of backspacing for the larger tires... what i have now are 15x8's wrapped in 28x9x15, and im moving up to 16x8 rims with 35x12.5x16 tires and i have 3inch bl and 6 inch suspension, so how much backspacing will i need to avoid any rubbing? i need to find out as soon as possible so i can take my rims back and get proper sized ones tmw, so if anyone can help that would be great!!

Last edited by blackbetty; 03-01-2007 at 10:06 AM.
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Old 03-01-2007
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anyone????????
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Old 03-01-2007
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you need a wheel that has a 3 5/8" to 3 3/4" back spacing to eliminate rubbing......
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Old 03-01-2007
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ok, i also just called my truck shop that i got my rims from and he said that the rims i got have 4 5/8 backspacing...too much? too little?
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Old 03-01-2007
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3 1/4 will also work
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Old 03-01-2007
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wow...that is too much backspacing.....you will most likely have some rubbing on the coil buckets with that much....i dont think the stock wheels have near that much...
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Old 03-01-2007
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i have like no backspacing with the stock wheels at all. How is backspace measured?
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Old 03-01-2007
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Old 03-01-2007
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oooo thank you!!!
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Old 03-01-2007
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ok so i double checked and THERE IS 4 5/8 backspacing with 6mm offset stamped on the mounting pad* so 4 1/2 inches of backspace right?
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Old 03-01-2007
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no your backspacing is 4 5/8" and you offset is -6mm probably......they are 2 different measurements that don't effect one another....
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Old 03-01-2007
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Quote:
Originally Posted by lifted97ranger
no your backspacing is 4 5/8" and you offset is -6mm probably......they are 2 different measurements that don't effect one another....

there isnt a -6 its just stamped 6mmoffset, i have to go to co-op but when i get home later tonight ill take a picture of the wheel.
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Old 03-01-2007
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Quote:
Originally Posted by blackbetty
there isnt a -6 its just stamped 6mmoffset, i have to go to co-op but when i get home later tonight ill take a picture of the wheel.
alright then you have a +6mm offset......the offset is how much the bolt flang is from the center of the wheel.......

the backspacing is measured from the flang were it meets the brake rotor or drum to the farthest piece of the wheel that hangs over the brake...
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