Rocky Mountain’s Growler 40 mountain bike takes full advantage of high volume tires for better traction on climbs and more control through aggressive lines. WTB 27.5+ x 2.1” Razer tires are especially fun in dirt, sand, and snow. Features aluminum alloy frame with 120mm SR Suntour 32mm suspension fork, Sram NX shifter and rear derailleur, 28t Rocky Mtn alloy crank, Shimano M365 hydraulic disc brakes, 11-speed 11-42 cassette. Color is black with black decals.