Tamiya 51766 TRF421X Replacement D Arms (x2)  [51766]

D-spec lower arms for TRF421X chassis (x2)

This kit contains two D-spec lower suspension arms molded from carbon reinforced nylon, matching the D-arm geometry used across TRF421-series chassis. They are provided as a direct replacement set or as an upgrade over the standard TRF421 kit arms.

The carbon reinforcement in the nylon provides a measured increase in stiffness without eliminating all flex, which helps retain predictable suspension feedback while improving stability on carpet and other high-traction surfaces. These arms are aimed at drivers who prefer a firmer arm characteristic for improved mid-corner control.

Installation is direct on compatible chassis: remove the original D arms and fit these units into the factory mounting positions, checking correct left and right orientation and ensuring the suspension links and pins operate freely. No additional mounting hardware beyond the original kit components is required.