This is a Delrin idler gear for HPI Savage platforms, specified at 29T and finished with a fluorescent coating for easier visual inspection during service. It is an RC-scale replacement part intended for the Savage family of trucks, serving the driveline by transferring rotation between the motor spur and downstream gears.
Designed as a like‑for‑like service item, the Delrin material offers low friction and quieter meshing compared with some metal options, while the fluorescent finish helps spot wear or misalignment during routine checks. Use it where a 29T idler is required; fit and clearance should be checked against the vehicle's gearbox and bearing locations before final installation.
Installation notes: remove the gearbox cover and inspect surrounding bearings and pins for wear, verify proper mesh and endplay after fitting, and run a brief low‑speed test to confirm smooth engagement. Treat this as a replacement spare to maintain drivetrain reliability rather than a performance upgrade.
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