Schwinn AL Comp Mountain Bike, 27.5 in., 21 Speeds, Unisex, Blue Also have many other Bikes More about this bike: Get away from it all and let loose on the trail with the Schwinn AL Comp. This lightweight aluminum mountain bike features hydro-formed tubing and front suspension for a durable, responsive ride. Adapting to changing terrain is easy with the 21-speed trigger shifters and rear derailleur, while front and rear mechanical disc brakes put you in control with all-condition stopping power. Plus, high profile alloy rims add even more lightweight strength without weighing you down. Have a blast with the AL Comp. Enjoy the freedom of riding a Schwinn. Lightweight aluminum mountain-style frame with tapered headtube and front suspension fork for a durable, responsive ride that can take on rugged trails. 21-speed trigger shifters and rear derailleur Front and rear mechanical disc brakes deliver all-condition stopping. High profile alloy rims add lightweight strength and durability without weighing you down.