Mono 12mm Hex Rear Wheel for B4.1/B44.1/RB5, White (4) (JCO3348W)

JConcepts Mono 12mm Hex Rear Wheels — White (4-pack) for B4.1, B44.1 and RB5 are a four‑wheel set of dish‑style rear wheels designed for 12mm hex hub setups on popular 1/10‑scale buggies, offering a durable, high‑traction upgrade for serious racing.

These wheels feature a robust inner rib design, a slight concave dish, and an outer glue catcher to help prevent glue from running down the wheel face during tire mounting. They are ROAR‑size and available in bright white or fluorescent yellow for on‑track visibility. The RB5 version is a direct bolt‑on; for B4.1 and B44.1 rear installs, adapters are required to fit the 12mm hex, and front wheels use standard wide‑width geometry as part of a complete 12mm hex conversion. Front wheels are designed for standard front width, and using a narrow front setup or omitting a rear locking nut can cause mounting issues, so a locking‑style rear wheel nut is recommended to ensure secure thread engagement on Kyosho RB5.