Note: Unassembled kit, need to assemble it yourself. The wheelie bar set compatible with Traxxas 1/10 Maxx RC monster truck. The 1/10 maxx front stand up wheel made of aluminum alloy and hard plastics ,sturdy and durable. When the RC car is running at high speed, the RC wheelie bar will avoid to rolls over when the rc car's head rises too fast. Upgrade parts,enhances the overall performance in handling and durability. Easy and convenient to install and remove. Material:Aluminum Alloy & Plastics Tire Outer Diameter: 40mm; Tire Width: 22.5mm Color:Blue Weight:230g/Set Package includes: 1Set RC Car Wheelie Bar Set