Tamiya 84039 - TRF801XT 14T Race Gear Bell  [84039]

Tamiya 84039 - TRF801XT Clutch Bell (14T)
Price:
AUD$25.06
Brand:
Tamiya
Model:
84039
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Upgrade Drive Characteristics with the 14T Bell

The Tamiya 84039 - TRF801XT Clutch Bell (14T) helps experienced hobbyists fine-tune drive behaviour. The 14T option adjusts the final ratio to 1:15.36 versus the 13T's 1:16.54, producing a firmer power delivery. This upgrade supports a race-focused build where quicker acceleration and higher top speed are desirable.

Benefits for Circuit and Sprint Use

Fitting the 14T bell modifies acceleration curves and can improve lap times on longer straights. It is a useful tuning step for drivers who want a more immediate throttle reaction without replacing major drivetrain parts.

You may want to try a different pinion to balance acceleration and top speed after changing to 14T, but a straight swap is a good starting point for testing.
The ratio change alters how the car accelerates, which can change perceived clutch engagement; check spring rate and engagement points to keep launches consistent.
Installation is straightforward for those familiar with TRF801XT maintenance: remove the old bell, fit the 14T unit, verify mesh and clutch clearance, then test run to confirm performance.

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