IFMAR appropriate, specially-designed 4WD front tires with 12mm inside hex. Perfect fit, and perfect for high-competition competition. The tires are constructed of versatile product while however being durable against outcomes. The medial part related to wheel is aerodynamic for optimum performance. Medium hardness. Unique top options that come with the wheel are noticeable from inside: reinforcement ribs to help make the tires as stable to and eradicate deformation. Group of 5 pairs (10 pcs) the expense of 4 pairs. An excellent value pack. Fits all XB4