Tamiya 51766 D Arms Upgrade for TRF421X  [51766]

Pair of D-style lower arms for TRF421X

This hop-up set contains two D-type lower suspension arms specifically molded in carbon reinforced nylon for TRF421-series cars. They match the D-arm geometry used on TRF421 and TRF421X chassis and are offered as a direct replacement or as an upgrade option to the kit-supplied arms.

The carbon reinforcement gives the nylon a firmer feel while retaining measured compliance, which helps stabilise the car under high traction and on carpet surfaces. Expect more predictable mid-corner behaviour and a slightly firmer arm characteristic versus standard molded nylon components.

Installation is simple on compatible models: remove the existing D arms and fit these parts in the same mounting locations, confirming correct left and right orientation and free movement of suspension pins and links. There is no need for additional hardware beyond the original mounting pieces from the chassis.