Mountain Bike Features: 1) 21-speed bike's twist shifting system with Shimano rear derailleur delivers consistent response for uphill and downhill rides. 2) Hardtail frame and front suspension fork combine for great riding over a mix of terrain. 3) Dual disc brakes provide a more consistent response and stopping action in wet conditions as well as dry weather. 4) 21-speed mountain bike has smooth twist shifting with the rear Shimano 7-speed indexed derailleur. 5) Dual disc brakes enable use of wider tires for greater traction on any terrain. 6) Padded saddle, with durable stitching, can be easily adjusted to the right height. 7) Strong, alloy double-walled rims are lightweight and complete this style with an edgy, aero-dynamic design. Length: 54.33", 8.27", Height: 45.76" Weight: 45.8 lbs.