Wahoo 20 Trail is a light and tough kids' bike that's ready to roll off-road. Its sturdy aluminum frame is easy to maneuver as they weave their way down the trail and rugged enough to handle the tough stuff. A 9-speed 1x drivetrain gives them plenty of gears for pedaling up steep trails, and disc brakes provide next-level stopping power to slow their roll or help them stop on a dime on the way back down. Perfect for riders between 45-52" tall. How tall are you? To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.