GPM Racing Aluminium 25T Servo Horn W. Built-in Spring (3 Positioning Holes) - 5pcs Set for Traxxas 1/10 TRX4 (TRX4025TA/3H)
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Handled by us in the UK under the Consumer Rights Act — no sending it overseas.
What our customers say
A selection of recent five-star reviews, as written.
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★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
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★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
Key Specs
- Scale
- 1/10
- Weight
- 18 g
About this product
Precision 25T Servo Horn for TRX4 Steering
This 25T aluminium servo horn is supplied as model TRX4025TA/3H for TRAXXAS TRX4 applications. Engineered for durability, the machined aluminium arm houses a spring element that reduces shock transmission to the servo during trail impacts, and three accurately spaced holes permit precise tie-rod geometry adjustments for different link layouts.
Technical installation notes: the integrated spring increases the horn thickness relative to stock plastic arms, which can necessitate reversing the support tie rod angle when mounted in the original TRX-4 servo location to achieve correct clearance. The component is designed to maintain the front reverse steering gear placement when installed correctly; confirm tie-rod alignment and measure link lengths before final assembly.
Package contents from the manufacturer include the 25T aluminium horn, stainless steel round head screws, an aluminium collar, and a 3mm metal washer suitable for a single-arm steering conversion or upgrade.
Compatible Models
- TRAXXAS TRX-4 DEFENDER
- FORD BRONCO 82046-4
- TACTICAL UNIT-82066-4
What spline and fit checks should I perform before fitting?
Verify the servo uses a 25T spline and inspect the horn flats for correct seating; ensure the servo output shaft fully engages the horn and that no lateral play exists prior to torqueing fasteners.
How does the integrated spring affect impact loads?
The spring absorbs peak forces from trail impacts, reducing shock transmitted to the servo gears and electronics; this improves component longevity but may alter transient steering feel, so re-tune link geometry as needed.
Are replacement fasteners available?
The kit includes stainless steel round head screws, an aluminium collar, and a 3mm washer; replacements or additional sets can be sourced through authorised parts channels if required. Write Product Review Please sign in your account before you can write any review.
Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
