FEATURES: The GT® Men's Aggressor Pro Mountain Bike is the answer for rocky terrain, winding single-track, and anything else that comes your way on the dirt trails Constructed with a 6061-T6 Aluminum Triple Triangle Frame and a 80mm travel suspension fork, the Aggressor Pro delivers optimal durability and handling. Easy to ride making it the perfect mountain bike for beginners Easily transition through different elevations with the 21-speed drivetrain Kickstand not included The manufacturer may substitute components with components of equal or greater performance level. 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.