I have the weight limit PDF off AC's site because I saw various weight limits when I bought my 350 Sprints (anywhere from 180-200 lbs.) and I wanted to know for sure what the limit supposedly was. I just checked on the 420's and assuming a normal build (non-Sapim/bladed), their weight limit is 200 lbs. If you're a heavier rider, you may want to consider going with something a bit beefier although I don't have any real world experience.