I put these on my ‘96 Klein mountain bike to convert it to more of a paved/smooth trail bike. Made the ride much more comfortable and much quieter. So far, I love them. Installed easily on my 26” rims, replacing my Panaracer 2.10’s. I put 60 psi in them and conservatively gained 1.5 mph on my average pace. Put about 50 miles on them this first week. Tried with lower psi but felt like riding in mud. I saw some reviews about going flat after riding on broken glass or crashing on wet synthetic surfaces. Both seem possible so I wouldn’t recommend those environments. I’m happy with how they look and perform under normal riding conditions. These tires are 50/559 in case you’re wondering. The description I saw only said 559.