Yiguo 4pcs Black 1/8 Scale RC Off Road Car Buggy Racing Tires Tyre and Wheels for HSP HPI Suitable for RC 1:8 Off Road Car. Tires are made of rubber with sponge inside, wheel rims are made of plastic, perfect replacement Plastic 12 Spoke Wheel Rim with 17mm Drive Hex. Material: Rubber/Plastic Note: The tire is not glued on rim, you can split it. If you want higher performance, please glue them well before using them.