Hobbyists tuning a TRF420 will find the Tamiya 54976 Brass Bumper Posts a tidy way to alter front-end feel without bulky ballast. At 6.85g per post, swapping the plastic B5 pieces brings around a 6 gram increase to the nose for a more responsive steering feel.
Placing more mass near the front axle changes the load distribution and can reduce understeer on tight sections. The effect is subtle and suits drivers who want finer steering feedback rather than radical changes.
These brass posts are produced for the TRF420 series and fit in place of the original plastic bumpers. The upgrade is a straight replacement job so you can test the setup quickly between practice runs.
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