I haven't gotten to try anything besides road tubes. I've got a 26x2 tube in the shed I'll try otherwise maybe I'll need to make something for the mtb crowd. I'll need to pick up a 29'er or a tube for 26" fat bike just to cover the bases. lol. It just seems like a lot of mtb folks are tubeless but I'll gave a tube next time I'm out. I've got my Trek Farley to make one for also.