GT 2013 Karakoram 2.0 Hardtail 29er Mountain Bike (X-Large) 29" wheel size Hydroform and Butted Speed Metal Aluminum with Triple Triangle Design Rock Shocks front Hydraulically Damped; 100mm fork with lock-out Hydraulic Disc Brakes; Shimano BR-M395 with160mm Rotor Shimano Deore Shadow Rear Derailleur Alex D19 Double Wall Rims