Specially designed XB4 rear wheels. They do not only perfectly fit but they are also perfect for high competition racing. The wheels are made from very flexible material but are still durable against impacts.
The side of the wheel is aerodynamic for maximum performance.
The special features of the wheel are visible from the inside – the reinforcement ribs are designed to make the wheels as stable as possible and to eliminate deformation.
The wheel design features a 14mm internal hex.