I installed a 1" spacer on the front and put 315's on ultra allyos. It works great with the after market rims verse the stock wheels because the off-set is greater on the after market wheels. I belive at least the 99 stock wheels are a 7. 5" wheel. The 315 is to big a tire for a 7. 5" wheel. 8" is as small as your should run. the 315's as the equal of a 35-12. 5-16 size ,any good tire guy should fit you up with 8" wheels. Good luck!
98. 5Quadcab, shorty,5sp,BD Brake, exhaust, power modual, gauges rancho9's 315's,bushwacker fender flairs, and so on!
[This message has been edited by davedd (edited 01-12-2001). ]