Tamiya 51739 TRF421 Upper Arm Spare Parts - Precision Replacement  [51739]

Swap in Tamiya Upper Arms for TRF421 Reliability

The Tamiya 51739 Upper Arm Spare Parts are intended for the TRF421 chassis to provide an exact replacement when original arms show wear. These parts help maintain consistent suspension geometry so your handling remains predictable during both practice and competition.

Tight Tolerances for Track Consistency

Produced to accurate specifications, these upper arms reduce play at the mounting points and support consistent tyre behaviour. They are ideal for builders who need repeatable results while dialing in their TRF421 setup.

Handy for Maintenance and Setup

These spare arms make routine maintenance straightforward and quick. Use Tamiya 51739 components to replace fatigued parts or to lock in a tuned setup after testing changes to springs, shocks, or anti-roll bars.