Description: These 7mm Wheel Hex Hub 8mm Extension Adaptor Tire Extension Adaptor Longer Combiner Coupler Specially designed for Axial SCX24 Deadbolt AXI90081.Jeep AXI00001.C10 AXI00002.B-17 Betty AXI00004 The 8mm Extension Adaptor Tire Extension Adaptor Longer Combiner Coupler adding a 8mm width extension per side of the vehicle for a wider increase the vehicle's stability, cornering speed, and brake efficiency Made of high quality brass material, durable, not easy to damage, designed for long-lasting performance. Easy to install on your RC car. 2g each fitted to the wheels to lower the vehicles center of gravity.increase its stability.7mm hex matching stock wheel hub Note: Please make sure you use the 7mm hub wheel. Specification: Item name: 7mm Hex 8mm Coupler Material: brass Perfect for: Axial SCX24 Deadbolt AXI90081.Jeep AXI00001.C10 AXI00002.B-17 Betty AXI00004 Hex: 7mm Total length: 9.6mm Lengthen:8mm 1 set: 4pcs Item Weight: 2g / pcs Package Includes: 4 x Hex Wheel Hubs 4 x pins 4 x nuts