3RACING 3RAC-HKD30/SI Silver 3.0 mm Double Servo Arm for Ko Propo Sanwa Systems  [3RAC-HKD30/SI]

Improve handling with the 3RACING 3RAC-HKD30/SI aluminium horn

For drivers seeking steadier responsiveness, the 3RACING 3.0 mm Aluminium Double Servo Arm provides a low-flex alternative to plastic horns. It is made to suit Ko Propo and Sanwa servo interfaces and finished in silver.

Strength, lightness and fitment

The aluminium construction gives a favourable strength to weight ratio, and 3.0 mm thickness reduces bending under load. This helps keep steering and throttle inputs accurate. The arm is compatible with Ko Propo and Sanwa style splines for broad usability.

Good for track and trail

Whether used on a compact touring car or a mid-size off-road machine, the arm supports consistent control feel across different driving conditions. It is an easy upgrade for hobbyists wanting a reliable mechanical improvement.