The RPM "Spider" 1/18th Scale Truck wheels are a unique design new from RPM and exclusive to the 1/18th Scale Truck. The "Spider" features eight split spokes with three grooved surfaces on each spoke, and the front diameter features a unique stepped design never before seen on any R/C truck wheel. Not only is the "Spider" stronger than stock, it weighs in at 3% lighter than a stock dish wheel which translates into less rotating mass, improved acceleration, and less unspring weight. All RPM 1/18th Scale Truck wheels are stock diameter, stock width, and stock offset. They work seamlessly with stock tires.