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 nonetheless being durable against outcomes. The medial part pertaining to wheel is aerodynamic for maximum performance. Moderate hardness. Unique top highlights of the wheel are noticeable from inside: reinforcement ribs to help make the tires as stable to and eradicate deformation. Band of 5 pairs (10 pcs) the cost of 4 pairs. A great value pack. Fits all XB4