3RACING 3RAC-HKS26/SI 2.6mm Aluminium Single Servo Arm for Ko Propo Sanwa Racing Setups  [3RAC-HKS26/SI]

3RACING 2.6mm Aluminium Single Servo Arm For Ko Propo/Sanwa - Silver - 3RAC-HKS26/SI
Price:
USD$3.50
Brand:
3Racing
Model:
3RAC-HKS26/SI
Condition:
Brand New
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Technical Overview for Tuners

The 3RACING 2.6mm Aluminium Single Servo Arm is a direct metal replacement engineered for precision steering inputs on Ko Propo and Sanwa servos. Its 2.6mm wall thickness balances stiffness with minimal added mass for race applications.

Engineering Advantages

Aluminium offers consistent flex characteristics under repeated loading, improving predictability in chassis balance and transient response. The 3RACING 3RAC-HKS26/SI reduces spline wear and maintains geometry alignment during aggressive steering cycles.

Application and Setup Notes

Install on servos with matching splines using the correct countersunk screw length to avoid preload. The arm is optimized for on-road touring and other race-spec platforms where precise steering ratios and minimal compliance are required.

What spline count does this arm assume?

It is manufactured to fit the common Ko Propo and Sanwa spline standards. Confirm your servo's spline count matches before installation to ensure correct engagement.

Recommended mounting hardware?

Use countersunk servo horn screws that seat flush without protruding. Match screw length to avoid contact with internal servo components and to reduce stress concentrations.

Tuning tips when switching to aluminium arms?

Expect slightly sharper steering response. Re-check endpoints and centring, and fine tune steering dual rate or expo to maintain desired handling balance after upgrading.