So I just picked up some RPF1s and I need some help on tire sizes. The rims are staggered 18x8.5 18x9.5. I have stock suspension for now and I don't know which size tires will fit properly. I kno someone will say Search but I just did and nothing came up with what I was askin. Thanks in advance.

 

with the 9.5 I plan on running either a 245 or 255 in the front.. dont know about the 8.5 though

 

This should work for your wheel sizes:
245/40/18 front
265/40/18 rear

 

^^^ agreed.

 

Depends on the offsets. An 8.5" wheel can accommodate 255 tire +/-10 and the 9.5" wheel can accommodate a 275 tire +/- 10. . . in general. Just keep the aspect ratios the same.

 

The 255/40 275/40 combo will definitely fill the wheel well on a stock suspension.

 

Like the above posts says, you have options.

 

This is what I went with. Thanks all for the suggestions.