Hey everyone I'm pretty new at this forum thing, I'm 18 an have a 92' f-150 XLT with a 5.0, stock. I'm looking to put some 15x8 American racing rims on it and I'm wondering what a good offset is for the rims. I found a set that has a -12 offset. Is that to much? Also I'm loYou add 1" to the rim width to account for the wheel flange (pictured below) because there is a 1/2" space on each side between the wheel flange and inner lip. The actual width of the wheel is measured from wheel flange to wheel flange. So if your wheel is a 15x8, the 8 (width) is measured by the wheel flange and not from outside lip to outside lip. oking to put 31x10.5 tires on them, is this a good size and will I need to put in lower gears and change the speedo?

 

Well, your stock tire width is 9.25in and you are looking to put on 10.5in wide tires. I would venture to say that the .63in difference per side of tire width won't hut you any on a stock rim. So if you use your stock rim offset I would think you would be O.K. If you want to be safe, add an inch to the offset. It will more than compensate for that difference.

 

Thanks bullit94, I'm looking to put 15x8 rims on there an I believe that the stock rim size is 15x7. So that extra inch offset might really help, thanks.