The Tamiya 54125 Direct Coupling joins the left and right rear wheels on the TB-03D chassis to reduce instability on low-grip surfaces. Using the centre pulley in direct mode the coupling enables consistent rear-end behaviour and allows four-wheel braking to be applied effectively during hard stops.
With the rear tyres mechanically linked the coupling produces a predictable, linear response during drift moves, helping drivers balance speed and angle through turns. The unit fits TB-03, TB-03D and EVO5 chassis styles and integrates neatly into standard setups.
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