Back spacing on front wheels

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HemiD@rt

HemiD@rt

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18x8 wheels up front, should I go 4.5 bs or 5? Going to run 235/40/18 tires.

Thanks!
 
Sorry if this has been answered before... All these offset and back spacing numbers has my head spinning big time! :banghead:
 
My 17x8's have zero offset which is 4 inches of back space. The tire size is 255x45x17.
 
I'm running a 18X9 and have 6"+/- back space. With the 73+ disk brakes and the 11-3/4" rotors.

If it was me I would get the 5" backspace can't go wrong there with an 18" rim IMO. The 4.5"B.S. is going to be getting close to the fender lip maybe even sticking out a bit.
 

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I run a 17x8 with 4.5BS, 225/40-17 front. When I had the 17x8 with 4.75BS I had a 245/40-17 front tire. I'd go with a 4.75 or 5" BS for an 8" wide wheel.
 
run 5" backspacing. That is a tall tire setup that will rub the fender lip if it sticks out (less backspacing) too much.
 
zhandfull said:
I'm running a 18X9 and have 6"+/- back space. With the 73+ disk brakes and the 11-3/4" rotors.

If it was me I would get the 5" backspace can't go wrong there with an 18" rim IMO. The 4.5"B.S. is going to be getting close to the fender lip maybe even sticking out a bit.
Click to expand...

What size front tires do you have on that?
 
5" backspace would be the minimum, 5.5" would be better.

18x8.75 wheels
6.25" backspace
+35 offset
245/40x18 front
255/40x18 rear

no rubs!
 

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I Agree going with the 4.5" backspacing is to close to the fender go with the 5" backspacing on an 8" wide rim
 
Thanks guys. I went with the Boss 338 wheels with the 5" of backspace.
 
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