hiland aluminum mountain bike,shimano 24 speeds,26 inch wheels, with disc brake,3 sizes for men mens bikes hh hiland a mountain bike is a bicycle designed for off-road cycling. mountain bikes share similarities with other bicycles, but incorporate features designed to enhance durability and performance in rough terrain. these typically include a front or full suspension, large knobby tires, more durable wheels, more powerful brakes, straight handlebars, and lower gear ratios for climbing steep grades.<br> <br> weight::about 31 lbs <br> frame: hiland aluminum,front/rear wheel quick release <br> fork:good suspension fork travel 100mm<br> crank:prowheel 24*34*42t<br> shifters:shimano ef500 24speeds <br> front derailleur:shimano tz500 tourney<br> rear derailleur:shimano ty300 tourney<br> cassette:shimano 14-28t <br> tires:cst 1820 26*1.95 <br> brake type: disc-brakes