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Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba) — image 1 of 5
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Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba)
Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba)
Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba)
Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba)
Aluminium Servo Horn (15mm-25T) - Optima Mid (Futaba)

Koswork Aluminium Servo Horn 15mm 25T Futaba – KOS04318

Brand: Koswork

Part No: KOS04318

£18.42 RRP £19.39

Shadow Stock: Usually ships within 4-5 days

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Finance options available at checkout.

Description

The Koswork Aluminium Servo Horn (15mm-25T) – Optima Mid (Futaba) is a compact aluminium horn featuring a 15mm arm and a 25T spline for Futaba-type servos. Identified by part number KOS04318, it offers a tidy solution where a short servo arm length is preferred.

Key Points

  • Aluminium construction
  • 15mm arm length
  • 25T spline (Futaba)
  • Brand: Koswork
  • Part number: KOS04318

Suggested Compatibility

Suggested compatibility includes:

  • Optima Mid (as referenced in the product name)
  • Servos using a 25T Futaba spline

Specifications

Koswork Kyosho Option Parts Compatibility Chart

Features:

*Designed to minimize forces transmitted back to the servo spline
*Bottom mount design to lower the leverage point and decrease the load on the servo
*Made of high quality aluminum
*Much stronger than the stock plastic horns
*Hole to hoel length 15mm for smoother steering response
*Designed to move freely, without rubbing the radio plate
*Clamping style with large m2.5 screw
*Although this horn was designed specifically for the Kyosho Mid Optima, it can also be used in most other applications
*25T fits Futaba, XP Digital, Reedy, Savox and ProTek servos
*Direct replacement & upgrade

*Made In Taiwan

*Cars, parts, accessories & others are not included.*

SPECIFICATION

Key Info:
  • Brand: Koswork
  • Part No: KOS04318
  • Barcode: 4710588225950

Delivery & Returns

Standard Shipping

£3.95 to most of the UK

Express Shipping

£6.95 to most of the UK

Worldwide Shipping

Available at checkout

Customer Reviews

3/5 (1 review)
Nigel Harvie
26th January 2026

Product gets a 2 star because it rests on the belt guard very tightly and is a terrible fit on the Turbo Optima Mid Special. Not sure about the other variants.
5 stars for the service and always a pleasure to deal with. Thanks.

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