Schwinn Sierra 2 Bike. The Schwinn Sierra 2 ensures all of your general fitness or commuting rides are incredibly comfortable and worry free. Its steel frame plus rigid steel fork are the ultimate in strength and dependability. The Schwinn Comfort saddle smooths out the ride while the riser handlebars ensure you're in a comfortable, upright position. The Sierra 2 sports a 7 speed drivetrain a single 40T chainring on the crankset and a 7 speed cassette on the rear hub that delivers a wide range of gears plus its Microshift Twist Shifter and Shimano Tourney rear derailleur ensure simple, precise shifting. Its 26 aluminum wheels with Schwinn Comfort tires are smooth rolling and the alloy V brakes provides plenty of stopping power.