My rims are 14". Aluminum rim is a lot lighter than the stock steel. I suggest trying to stay as light weight in your new combo as possible. Those mambas weigh about 12lbs more than one of my new tires on the rim. That's okay on a machine with extra cc. On a pioneer build, stay light. Just my opinion tho.Moose, I notice with the wheel upgrade you went with 12s why not 14s. Are they to big(rub)?