Pro-Line brand pair of Pro-line Velocity 2.2 12mm Hex Front Wheels in Yellow for the Associated B4 and B4.1 and the Kyosho RB5. FEATURES: Constructed of nylon, ultra lightweight design Reversed dish design protects the nut and axle from damage during collisions YOU WILL RECEIVE: Two Pro-line Velocity 2.2 12mm Hex Front Wheels SPECIFICATIONS: width: 0.98 (25mm) diameter: 2.2 (56mm) Hex Size: 12mm COMMENTS: To use with the Associated B4 and B4.1, the 12mm Hex Conversions Front (PROC7600), and Rear (PROC7700) must be used jxs 01/26/12 ir/jxs