I took some measurements. The stock axle is 37" from end to end. 34" from outside hub to hub mounting surfaces. The stock rims have a 5 1/2 outside offset from mounting surface to outside of rim bead. That puts me at 45" width. I will need a 40" axle with stock rims or I get +6/-3 offset rims with 1" oversize width tire (thinking 22x10x9 on a 9x9 stock rim). That would put me at 48". I would rather get the longer axle. I like the durability of the stock rims and they are cheaper.