Diamondback Bicycles 2014 Response Mountain Bike with 29-Inch Wheels Butted 6061-T6 Aluminum Response Trail Frame SR Suntour XCT 100mm Suspension Fork Shimano Altus 7spd rear derailleur w/Shimano EF-51 Easy fire 7spd shifters 32h Diamondback SL-7 Double wall Rims Promax Mechanical Disc Brakes with 6" rotors