Off-road, on-road, the Surge will be great for mountain biking and street cycling. A fantastic and affordable package in a mountain bike. Technical Specifications Frame: Alloy MTB Frame with oversize tubing Handlebars: Alloy Handlebar with Bar Ends attached Derailleur: Shimano 21 Speed rear derailleur and Shimano Thumb shifters Crankset: Alloy 170mm Crank with 24/34/42t Steel chainwheel Brakes: Front and Rear Alloy Disc Brakes Saddle: Comfortable Sports Saddle Wheels: Alloy rims, 26" x 1.95 MTB Tyres Seat Height: 17" Size: Min. 84.5cm