Rocksbike AIM 1.2 | Adults | MTB | Wheel size 29" | Number of speeds 21 | Frame Alloy | Bicycle seat Dacron XML Mechanic Lockout | Brakes Aluminium V-shaped | Front gears 3 | Rear gears 7 | Rear derailleur Shimano RD-TY300D | Grey / Blue | Weight 16.2 kg