I know I have been posting a lot of questions in a short amount of time. Just got into modding my truck and I am a little excited. So, can I mount 33x12.5x17 on stovk 17" ford wheels. The tires are procomp (never heard of the comination of metric and standard,but it does make things easier) Also, mounting a 12.5" wide tire on a 17" wheel keeps the tire more tucked in the fenderwell right?

 

yea i was wondering about that to? would that tire fit on a stock 17 rim?

 

Yes, you can mount a 33x12.50-17 on the stock 17x7.5 inch wide wheel. I believe that Pro Comp recommends a minimum rim width of 8 inches for that size, but I've seen plenty of people do it without any problems. In theory, mounting a tire that is too wide on a wheel that is too narrow will cause the center portion of the tread to wear slightly faster than normal. However, you are only talking about 1/2 inch in your case. I doubt you will see a moticable amount of treadwear difference over the life of the tire. You are correct, this combo will keep the tires more "tucked in".