Corsa Alton Mammoth 2.0 26" Wheel 27-Speed Alloy Frame Bike, Dark Army Green, 20"/Large New Army Green alloy frame weighing at 43 pounds 27 speed with Shimano Deore F. Derailleur & Alivio R. Derailleur 26 inch x 4 inch thick knobby tires to conquer Sand and snow Promax disc brakes for maximum brake efficiency Wide handlebar off road type for more control and comfort