What width rims to run for 31x10.5" Tires
 

I have a 2000 Chevy Blazer and im getting 31x10.5" tires but im wondering what size rims will work good for them without ballooning the sidewalls. I see people put them on the stock size 15x7's and 15x8's, or should i go with 15x10's?

ZR2's came with that size tire stock on the same sized rims all blazers came with. As in 15X7.

I think 15x8 is the way to go, that's what ive got my 31's mounted on.

They work fine on stock rims, as posted, thats how they came on ZR2's. If you look on some manufactures websites, they actually list the preferred rim width, and the min/max rim widths,