SHREDDIN RC HPI BAJA DUAL WHEEL ADAPTER KITShreddin' RC Dual wheel adapter: Get some extra traction with Shreddin' RC's dually adapter. Very easy to install, and does not require any modifications. Simply remove your old hex hub leaving the set screw in the axle shaft. Slide on the adapter, insert pin, tighten factory set screw. Slide inner wheel onto hub, tighten with provided nut. Install original hub onto adapter, insert pin, secure with provided set screw. Install outer wheel and original wheel nut. Quick and easy installation and removal for changes at the track or your favorite bash spot. All hardware is included. Kit does not include second wheel and tire. Wheel spacing is set for the 5b size wheels. Adapter will work On the 5t/sc but there will be a gap between tires. 5t/sc size adapters will be available soon. Adapter will work with aftermarket hub extenders and drive axles. Using extenders will only create gap between tires. Lifetime warranty.