The tires are IFMAR standardised with all the wheel hex offset. The wheels feature countersunk center area which allows the wheel nut to stay deeper in wheel. The wheels are ideal for high-competition race. They feature interior reinforcement ribs to deliver security and resist deformation. The medial side for the wheel is aerodynamic for maximum performance. The tires had been built to provide maximum traction. The tires function a 12mm interior hex. Yellowish color group of 2 (1 set)