backspacing and bolt pattern question.

[hummer74]

i'm looking at getting new rims. they are 18X9 and bolt pattern comes in either 8-170 or 8-6.5 and the backspacing is 4.75. which bolt pattern do i need? and is that backspacing going to put the tires way outside the wheel well? if any of you guys have rims with 4.75 backspacing could you post some pics? Also, i'm planning on running 37's on the rims do you think i'll be alright with a 9" rim? Thanks to everyone in advance for your answers.

[KenP]

Originally Posted by PhilD

8 x 6.5 lug pattern.

Stock rim is 8.5" wide with 5.5" BS, 9" with 4.75" BS will be fine and will reduce the amount of rubbing slightly, especially with 37's.

Stock rims have a offset of +19, the rims you are looking at have an offset of -6, so you will move the centerline of the rim 1" further out, add to that the extra 1/4" of width and your tires will be approx 1.25" further out than stock.

Uh, thanks for whatever you said Phil