Features of the Rocky Mountain Growler 20 Frame: Rocky Mountain 6061 Alloy. Threaded BB. Boost 148mm. Tapered Zerostack Headtube. Dropper Post Compatible Sizes: S - M - L - XL Fork: Suntour XCM34 DS 130mm Front Travel: 130mm Headset: FSA No. 57B Stem: Rocky Mountain XC Handlebar: Rocky Mountain AM 780mm Grips: Rocky Mountain Lock On Light Brakes: Shimano MT201 2 Piston Brake Levers: Shimano MT201 Shifters: Shimano Altus Rear Derailleur: Shimano Altus 9 Spd Cranks & Chainrings: Rocky Mountain Microdrive 28T Bottom Bracket: FSA Sealed Cartridge Bearing Cassette: SunRace CSM980 11-40T Chain: KMC X9 Pedals: Alloy Platform Front Hub: Shimano MT400 Boost 15mm Rear Hub: Shimano MT400 Boost 148mm Spokes: 2.0 Stainless Rims: WTB ST i30 TCS 2.0 Tubeless Tires: WTB Trail Boss G2 29 x 2.6 Seatpost: Rocky Mountain 30.9mm Saddle: WTB Volt Race 142