Manufacturer may substitute components with components of equal or greater performance level Named after the mythical creature in Nordic culture, the Grendel is a unique monster cross bike built for aggressive riding from gravel grinding to ultra XC racing. Built on a Tectonic(R) T2 butted aluminum 29'er hardtail frame with front shock, road drop bars, and optimal tire clearance, the Grendel strikes the right balance of agility, responsiveness, and comfort. Features: Heavy-duty Mongoose Tectonic(R) T2 butted aluminum frame with front shock offer increased strength for aggressive riding Hydraulic disc brakes provide reliable and responsive stopping power Adventure geometry with drop bars for aggressive riding position 29" wheels with 1.75" tires for controlled riding on technical terrain Lightweight 1 x 11 drivetrain for clean, agile off-road riding NOTICE: Used Bikes and/or bikes purchased online that have been assembled are non-returnable. We strongly recommend that a professional bicycle mechanic properly assembles, repairs, and maintains the bicycle. Dick's Sporting Goods will provide free in-store assembly service by a certified technician for any bicycle purchased on our website or in our stores (proof of purchase required). If you choose to assemble the bicycle yourself, Dick's Sporting Goods is not responsible for injuries or damages resulting from improper assembly.