The tires are IFMAR standardised utilizing the wheel hex offset. The tires work countersunk center area that allows the wheel nut to sit much deeper within the wheel. The tires are ideal for high-competition racing. They work internal reinforcement ribs to present stability and resist deformation, yet they truly are created from a flexible product to produce durability and withstand impacts. The medial side associated with wheel is aerodynamic for maximum performance. The wheels was indeed created to offer maximum traction. The tires function a 12mm inside hex. Pair of 2 (1 set)