This is a factory‑assembled and pre‑glued rear tire and wheel combo from Traxxas designed for high‑speed on‑road performance. It includes two belted S1 compound slick tires that are mounted on split‑spoke black chrome wheels with foam inserts installed, so you can bolt them onto your RC vehicle without needing to mount or glue anything yourself. The belted tire construction helps resist ballooning at extreme RPM, maintaining tire shape and stability during fast acceleration and high‑speed runs, while the soft, durable S1 rubber compound delivers excellent grip for rapid launches and traction on smooth surfaces.