TRF421X 14mm Balance Weight (2.5g) - Tamiya 3451593  [3451593]

TRF421X balance tuning weight

This Tamiya 3451593 is a 14mm hop-up weight rated at 2.5g, intended for use on the TRF421X touring chassis. It serves as a compact accessory to make small front or rear mass changes for 1/10 touring models during setup.

Fitment matches the TRF421X hop-up locations, so always verify part number 3451593 when ordering spares. The item is a tuning aid rather than a drivetrain or suspension upgrade, enabling fine balance shifts without altering major components.

Installation is simple for experienced builders: remove the original weight or hop-up piece from the TRF421X mounting point and secure this 14mm unit with the existing fasteners. Tighten hardware to spec and re-check alignment after a brief run to confirm the balance effect.

Use the 2.5g mass to subtly change handling toward more front bite or added rear stability, depending on placement and combination with other hop-ups. Small increments like this work best with controlled track testing and setup notes to observe changes in corner entry and mid-corner behavior.