Schwinn 2008 Sumac GSD Men's Mountain Bike (26-Inch Wheels, Medium) Men's mountain bike with N'litened Silver Label alloy frame, epicenter seat stay, and 26-inch wheels Alloy MTB style 30-millimeter rise handlebar and alloy seat post 24-speed SRAM equipped rear derailleur with SX-4 trigger shifters Double-wall alloy rims with double-sealed alloy cassette rear bulb Promax linear pull brakes and brake levers; five-year frame warranty