The tires are IFMAR standardized along with the wheel hex offset. The tires work countersunk center area which allows the wheel nut to help keep much deeper in wheel. The tires are perfect for high-competition battle. They work interior reinforcement ribs to deliver protection and resist deformation, yet they truly are typically made out of a flexible item to produce durability and withstand results. The medial part of wheel is aerodynamic for maximum performance. The tires have now been designed to provide maximum traction. The wheels work a 12mm inside hex. Couple of 10 (5 set)