Give your nitro engine reliable rotational mass and smooth performance with the Traxxas 4142 Fly Wheel, a precision‑made flywheel that helps stabilize engine speed for consistent idle, acceleration, and overall power delivery. This flywheel is compatible with Traxxas nitro models that use the TRX series engine setup—such as the Traxxas Revo, T‑Maxx, and other TRX‑powered trucks—helping maintain smoother throttle response and better engine control during tuning and running. Easy to install and built to last, it’s a key maintenance or upgrade part to keep your nitro ride performing consistently on every session.