The tires are IFMAR standardised with the wheel hex offset. The tires work countersunk center area that enables the wheel nut to sit more deeply in wheel. The wheels are ideal for high-competition racing. They work interior reinforcement ribs to give you security and resist deformation. The medial side regarding the wheel is aerodynamic for maximum performance. The tires was in fact designed to provide maximum traction. The tires work a 12mm inside hex. Yellowish color musical organization of 10 (5 set)