The Tamiya 53921 Front Aluminum Differential Joint was developed for the TRF415 platform to allow swapping the stock front one-way for a ball differential arrangement. This modification tends to smooth front traction and helps drivers achieve a more balanced turn-in on a range of track surfaces, particularly in formats that restrict front one-way units.
Tamiya 53921 gives TRF415 owners a reliable route to a ball differential front end, useful for fine-tuning handling where consistency matters most.
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