The wheels are IFMAR standardised with all the wheel hex offset. The tires feature countersunk center area that allows the wheel nut to sit deeper within the wheel. The wheels are ideal for high-competition racing. They function interior reinforcement ribs to present security and resist deformation. The medial side regarding the wheel is aerodynamic for optimum performance. The tires were designed to provide maximum traction. The wheels function a 12mm interior hex. Yellow color group of 10 (5 set)