Frame - Series 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 TabsHeadset - FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”Extras - Marin Chain Tension DeviceExtras - Marin MTB Seat Clamp, Bolt Type - - - - - - - - - - - - - - - - - - - - - -