The tires are IFMAR standardised aided by the wheel hex offset. The tires work countersunk center area that enables the wheel nut to stay deeper in wheel. The tires are well suited for high-competition race. It works interior reinforcement ribs to give you safety and resist deformation. The medial part concerning the wheel is aerodynamic for optimum performance. The tires was in fact made to offer maximum traction. The tires work a 12mm inside hex. Yellowish color musical organization of 10 (5 set)