The ZeroRC Hub-O-6-4 refers to a 4-piece set of Orange "Narrow" Wheel Barrels/Lips designed for the modular ZeroRC wheel system, compatible with the RW00 series RWD chassis.
 
Key Specifications & Features:
 
Modular Component: These are specifically the "lips" or "barrels" only, forming the main structure of the wheel. You must pair them with a compatible wheel face to create a complete wheel assembly.
Width: This specific part number (ending in "-6-4") denotes a "narrow" wheel frame/barrel, designed for standard front or narrow rear tire setups.
Material: High-quality plastic or composite material, finished in orange.
Quantity: Sold as a 4-pack, providing enough barrels for a complete set of four narrow wheels.
Compatibility: Designed for the ZeroRC RW00/SR RWD chassis and Mini-Z RWD platforms. They are not compatible with most AWD hubs.