Tamiya 3451593 14mm Hop-Up Weight for TRF421X  [3451593]

Balance weight for TRF421X chassis

The Tamiya 3451593 supplies a compact 14mm, 2.5g hop-up weight made for the TRF421X touring chassis. It is intended as a tuning accessory to make modest adjustments to the mass distribution of 1/10 touring models.

Fitment is specific to the TRF421X designated hop-up points, so verify the part code 3451593 when ordering replacements. As a tuning element it alters handling characteristics without changing suspension geometry or drivetrain parts.

To install, remove the existing weight or hop-up component from the TRF421X mount and replace with this unit, using the original fasteners. Ensure fasteners are secure and run a short test to confirm the desired balance change.

For setup work, combine this weight with track testing and systematic logs; small gains from a 2.5g change are best assessed incrementally to track effects on cornering and stability.