Factory 20" wheel back spacing?

[cwharding]

Looking at an aftermarket set of 20's. They are 9" wide and have a -12 back spacing. They have Cooper STT 35/12.5/R20 mounted on them. Will these fit without rubbing too aweful bad until I buy a leveling kit? What back spacing do the factory 20's have?

Thanks,

cwh

[08stroker250]

Originally Posted by cwharding

Looking at an aftermarket set of 20's. They are 9" wide and have a -12 back spacing. They have Cooper STT 35/12.5/R20 mounted on them. Will these fit without rubbing too aweful bad until I buy a leveling kit? What back spacing do the factory 20's have?

Thanks,

cwh

Im not sure what the backspacing is, but I have stock 18's and I ran a Nitto 325/65/18 on them with a 2.5" leveling kit and they rubbed on the drivers side radius arm. That tire is 35" tall and 13" wide. So I would think that those Cooper tires will most likely fit without rubbing. If they do you could always use spacers...

[cwharding]

Anybody else have Cooper SST experience?

[powerstroke586]

i have 35x12.50 mud grapplers on mine with a 2" leveling kit and they rub the radius arm a little bit when turning sharp i have factory 20's and was also looking to get new ones and was told that anything with a negative offset would need a four inch lift