Need Help on Wheel Fitment Please

[fdchief]

Wheels im lookin at are 17x9 with a -12mm offset... will these fit on a stock suspension 05 fx4 crew with 285/70/17 maxxis mudders?

[losrocket]

A -12mm offset on a 9" rim is equal to a 4.5"" backspace. Thats ideal for 99-04's but not '05+. A 4.5" BS on your truck will cause the wheels to stick out too far. Heres a good chart for picking out wheel widths and the right BS.

[fdchief]

thank you for the reply... so what would be the most correct rim size for me to go with on my truck?... ive got a good concept of the math formula but all those numbers tend to make my head hurt a lil...i really like the stock rim size now.. just want new rims...

[losrocket]

'05+ and newer SD's came with a 6" backspace so you want to stay in that range if all you want is new wheels but the same look. Look for wheels that have either a 6" backspace or +25 mm offset. That will keep the fitment like stock.

Edit: Thats on a 9" wide wheel.

[fdchief]

wow tryin to figure out the size i need is makin my head hurt...but thank you so much for your help..

[losrocket]

I hear ya man, i went through the same thing when i was looking for wheels for my truck. The above chart i posted is really helpful to me though so id definitely save it for future use. Good luck!!