I've used WTB tires for years but this is the first time I've tried the Trail Boss. I got the 2.4 x 29". It installed just fine - not too difficult to get on like some other brands. I have it only on the rear on a hardtail single speed. Because its single speed on steep hills I can't just gear down keep my butt on the saddle and spin - I have to come out of the saddle so traction is really important. I ride in the desert southwest - from hardback to loose dirt/rocks. I am very happy with the traction on the steep loose stuff. It also rolls great on the fast flowing trails. It's not heavy and has descent sidewall protection. I'll definitely look for this tire again when I need a replacement.;