These tires are a color variation of Item 15379 JR Offset Tread Tires - Hard/White and offer a 5-6mm selection of tread settings by just changing the direction of their attachment towards Mini 4WD vehicle. Tricky Offset Tread Tires (Front) x2 Intense Offset Tread Tires (back) x2 Gives your machine more tread on songs with plenty of straights, and less on more technical circuits. Difficult tires suggest less bouncing from the track whenever landing after jumps. Appropriate for Mini 4WD and Mini 4WD PRO cars fitted with tires for big tires.