This 55T titanium main gear is an aftermarket spur gear produced by GPM for Team Associated RC18T models, supplied as 1 pcs. It is a direct-replacement scale accessory intended for RC use only, built to function as the primary spur in the RC18T drivetrain.
In practical terms the titanium alloy offers a balance of corrosion resistance and wear performance compared to common steel options, making it suitable when durability and consistent gear engagement are priorities. The part is intended to sit on the chassis spur mount and interface with the pinion gear on the motor, so correct meshing and alignment are essential.
Installation notes: remove the existing spur, verify the spline and mounting surface are free of debris, slide the gear onto the spur shaft and set the pinion-spur mesh with minimal backlash and no binding. After finalizing mesh, secure the gear with the original fastener and verify smooth rotation across the full drivetrain sweep. Check for clearance with surrounding gearbox components and adjust shimming if necessary.
Tuning role: swapping to a titanium main gear mainly affects durability and long-term mesh stability. When changing to this part, re-check gear mesh and drivetrain runout as part of routine setup, and consider its interaction with your chosen pinion size when adjusting gear ratio for track conditions.
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