Rim size

i have ben in a acident recently. dam it sucks. but my ruck was fixed right up and runs almost like new. they mechanic who fixed it said that i have two warped rims. i can still drive but it vidrates at around sixty. i was looking to get some new ones. a would like to get bigger and better rims but i was wondering how big i can go on my stock axle tranny and suspension. i need a six lug to.

 

All depends on what look you're going for. Big beefy offroad look or low-pro street. Tires will be a big part of the equation. Without a lift, you can get bigger wheels, but will need to go with a lower profile tire. Stock size is 245/70/16 or 265/70/16(trd offroad), both of which are a 31" circumference.
Stock rims are 16x7.