IFMAR appropriate size, specially-designed 2WD/4WD back tires with 12mm internal hex. The guts countersunk area was redesigned to put the wheel nut deeper. Precision fit, ideal for high-competition race. Produced from flexible, durable material to withstand effects. Along side it regarding the wheel is aerodynamic for optimum performance. Medium hardness. Unique features of the wheel are noticeable from inside: reinforcement ribs to help make the wheels as stable that you can and eliminate deformation. Set of 5 pairs (10 pcs) for the cost of 4 pairs. A fantastic value pack. Fits all XB2 & XB4
