i was just wondering if i could fit a 12.5"wide tire on a 7 inch wide rim i currently have 10.5" and they fit fine but when i buy my 33's soon should i go 10.5 or 12.5

 

i run 37x12.5 mtr's on 8in wide rim

 

12.50s should be fine on a 7inch wide rim, but 33x10.50s would be alot better. plus they dont put as much stress on your truck as the 33x12.50s would

 

Most manufacturers suggest a rim size od 8" to 10" depending. I have 33x12.5/15 on the factory 15x7" alloys..



I should add that because of the factory backspacing it rubs somewhat and you HAVE to run a lower PSI to keep a flat even wear pattern, which also kisl MPG!

 

yea those are the same rims i have

 

General rule of thumb is tire width up to about 4-1/2" more than rim width for good on- and off-road performance. A little wider is OK for off-road only, but you may find increased tire wear on-road. I've run 33x10.50s on stock 6" steel rims with good results, but do get a little increased tread wear in the center of the tire where it wants to bulge up from the narrow rim.