I'm looking to buy new rims for my 400EX and would like something similar in size, I don't want to go to wide or too much of a different offset. Does anyone have the front and rear rim specs?

 

Stock tires on the 400EX are 20x10x9.

 

The rim size is stamped right on the stock rim!

Rear is 8X9", and the offset is something like 4+4" (??). Front is 10X5.5", and the offset must be something like 3.5+2" (??).

Try ITP GP series rims, or just get another set of stockers. http://www.itptires.com/techinfo.html

 

Does anyone know if stock is 4 - 144 or 4 - 110?

 

Yes.

 

Is it 4 - 144 for front and 4 - 110 in the rear or are they the same? Rims that "fit" the 400EX are listed both as 4 - 110 and 4 - 144, I want to be sure I order the correct size.

 

4x144 front 4x110 rear