Schwinn Mesa 20 Boys Kids Bike - 2016. Ready for adventure, the Schwinn Mesa 20 Boys Kids Bike will have your young boy gliding smoothly over pavement and hardpack trails. It has a lightweight, yet tough aluminum frame that's highly responsive and a steel fork for years of reliable performance. 7-speed drivetrain with Shimano Tourney rear derailleur and SRAM MRX grip shifters provide quick, effortless gear changes and take the work out of the hills. Alloy V-brakes deliver rapid and controlled stops while strong alloy wheels with Innova Trail Kids tires roll easily over all types of terrain.