This 55T titanium main gear is an aftermarket spur designed to interface with Team Associated RC18T chassis, supplied as 1 pcs. It is a direct replacement spur intended for radio control drivetrain use and formed to function as the primary spur in the RC18T gear train.
The titanium alloy was chosen for its favourable corrosion resistance and consistent wear profile relative to common steel spurs, aiding sustained tooth contact under extended running. The component locates on the chassis spur mount and interfaces with the motor pinion, so careful spline engagement and backlash control are necessary for optimal contact patterns.
Assembly notes: remove the existing spur, inspect and clean the spline and mounting faces, fit the gear onto the shaft and set the pinion-spur mesh with minimal but safe backlash and no binding. Secure the unit with the original fastener and rotate the drivetrain to confirm smooth operation across the sweep. Verify clearance with gearbox housings and adjust shims to correct any interference.
Tuning guidance: installing this titanium main gear is primarily a durability and mesh-stability upgrade. After installation, verify gear mesh and drivetrain runout as part of normal setup checks, and account for your selected pinion when adjusting overall gear ratio for specific track or surface conditions.