I'm riding hope pro II/ex 5.1 with the a bolt on axle. i weigh 215lbs. Rode inSB a few weeks ago and pinched flatted but didnt realize it immediately. Didn't really matter since I had no tube or pump and it was getting late, so I kept riding it for my safety to get out before the sun went down. The wheel got a few scratches but other than that is fine. I went through quite a few rockgardens before I realized my problem and slowed it down.