GPM Racing Aluminium Servo Horn 25T (4 Positioning Holes) - 4pcs Set for Traxxas 1/10 TRX4 (TRX4025TL)
We are the importer of record — the price you see is the price you pay.
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
-
★★★★★
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
- 12 g
About this product
25T aluminium servo horn engineered for TRX4
This aluminium servo horn is a scale replacement intended for TRAXXAS TRX4 Trail Crawler steering systems and is machined from 6061-T6 alloy for a durable metal alternative to plastic arms. It uses a 25T spline and a straight-arm profile to reduce flex under repeated steering loads.
Operational role: the horn couples the servo output spline to the tie rod and the four-position mounting provides incremental tie-rod length and steering ratio options without replacing parts. These options help with precise steering tuning and centring behaviour on scale crawlers.
Installation guidance: align spline positions, fit with the supplied stainless fasteners and verify neutral steering prior to final torque. For long-term metal-to-metal joints apply a small amount of thread-lock where screws engage alloy surfaces and recheck full-lock travel after fitting.
- Sold as 4 pcs set.
- Includes: Servo Arm – 1 pcs, Stainless Steel Round Head Screw 3×14 – 1 pcs, Stainless Steel Flat Head Screw 3×8 – 1 pcs, Stainless Steel Cap Head Screw 2.5×6 – 1 pcs.
Compatibility with TRX4 splines
The TRX4025TL is sized for 25T servo splines commonly used on TRAXXAS TRX4 steering outputs and installs as a direct metal replacement for stock arms.
Adjustment strategy for steering ratio
Use different tie-rod holes to alter the effective lever arm; inner positions increase steering rate while outer positions soften it. Make incremental changes and test to achieve balanced centring and responsiveness.
Hardware and set contents
The product is supplied as a 4 piece set with the servo arm and the stainless steel screws listed, allowing straightforward installation on compatible TRX4 setups. 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
