Rocksbike Supreme 4.3 | Adults | MTB | Wheel size 29" | Number of speeds 24 | Frame Alloy | Bicycle seat Dacron XML 38.1 | Brakes Mechanical disc brakes | Front gears 3 | Rear gears 8 | Rear derailleur Shimano RD-TY300 Tourney | Black / Yellow | Weight 15.6 kg