For traction and easy travel over loose dirt trails, rocky gardens, or wet terrain, the Mongoose(R) Men's Teocali Expert 27.5'' Mountain Bike is what you need. It has an all-mountain aluminum frame with dual suspension. Along with a 2 x 10 drivetrain, Shimano shifters, and disc brakes, the Teocali Expert is aggressive on every type of terrain and path. FREE STANDARD SHIPPING ON ALL BIKES SIZE CHART: Disclaimer: Size chart does not provide exact sizing, only a general guide. Sizing may vary based on individual body type. 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.