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.
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.
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