Trek Checkpoint ALR 3Checkpoint ALR 3 is the best value gravel bike in the line up. Kitted out with a 300 Series Alpha Aluminium frame, the Checkpoint ALR 3 is just as responsive on chunky gravel roads as it is smooth on the tarmac. Tubeless ready wheels help fight punctures in the rough while a 2x9 speed Shimano group set and mechanical disc brakes balance budget with reliability. It's right for you if You want to make the jump into the wide world of gravel, exploration