Schwinn AL Comp 27.5 inch Men s Mountain Bike 21 Speed Adult Bicycle Grey 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 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. View more from us on our brand page.