Traxxas Telemetry Trigger Magnet Holder Spur Gear RPM Sensor TRX6538

Overview

The Traxxas Telemetry trigger magnet holders (TRX6538) represent a sophisticated accessory for RC enthusiasts who want to unlock real-time performance data from their models. This ingenious component works by securing a trigger magnet directly to your spur gear, allowing compatible RPM sensors to detect wheel speed and engine revolutions with pinpoint accuracy. Whether you're running a high-performance Traxxas Rustler, competitive Spartan racing boat, or advanced TRX4 trail crawler, telemetry data transforms how you tune, diagnose, and optimise your RC car or truck for maximum performance.

For UK RC hobbyists serious about competitive racing or precision tuning, telemetry has become essential. By pairing these magnet holders with a Traxxas TQi radio equipped with the 6511 Traxxas Link Wireless Module, you gain access to comprehensive performance metrics through the free Traxxas Link mobile app. Monitor RPM, speed, temperature, voltage and numerous other parameters in real-time during runs, then review detailed logs afterwards to identify exactly where you're losing performance. This level of data-driven insight was once reserved for professional racing teams; now it's available to any dedicated RC enthusiast running a modern Traxxas platform.

The TRX6538 package is thoughtfully designed with both 1/16 and 1/10 scale applications in mind, making it versatile across Traxxas's extensive model range. The precision engineering and quality manufacturing you expect from Traxxas is evident in every component, ensuring reliable magnet detection lap after lap, whether you're bashing at the track, competing in organised UK RC events, or pushing your brushless truck to its limits in the garden.

Key Features

• Dual-scale magnet holder design — This accessory package includes both a smaller 1/16 scale magnet holder and a larger 1/10 scale magnet holder, making it compatible with a broad range of Traxxas platforms from compact stadium trucks to full-size rock crawlers and racing buggies.
• Spur gear mounting — The magnet holder secures directly to the spur gear, the main drivetrain component that powers your wheels, ensuring that every single rotation is detected by the RPM sensor for completely accurate speed and performance data.
• Real-time RPM and speed data — When integrated with an RPM sensor and Traxxas TQi radio system, this component enables live telemetry streaming to your mobile device, allowing you to monitor wheel speed and motor RPM during operation without slowing down or stopping your RC car.
• Comprehensive system integration — Works seamlessly with the Traxxas TQi radio system, the 6511 Traxxas Link Wireless Module, and the free Traxxas Link mobile app to create a complete telemetry ecosystem that rivals professional racing equipment.
• Premium stainless steel magnets — The package includes precision-engineered magnets in multiple sizes (5x2mm and 3x8mm and 3x10mm), manufactured to exacting standards to ensure reliable detection and consistent performance across thousands of rotation cycles.
• Complete fastener assortment — Includes all necessary CCS (collarless countersunk) screws in two sizes (3x8mm and 3x10mm) with three pieces of each size, eliminating the frustration of hunting for correct hardware and ensuring secure, professional installation.
• Weatherproof reliability — Engineered to withstand the demanding conditions of outdoor RC racing, whether you're running on wet grass, dusty tracks, or in variable UK weather, the magnet holder maintains secure contact and reliable detection performance.

Technical Performance

The Traxxas telemetry magnet holder system represents cutting-edge performance monitoring technology scaled for the RC enthusiast market. The precision engineering focuses on minimal weight addition to your drivetrain whilst maintaining absolute reliability in magnet positioning and detection. The stainless steel magnets provide consistent magnetic field strength across the temperature range experienced during extended running sessions, whether you're operating a brushless motor at peak RPM or pushing a 3S LiPo-powered RC truck through competitive heats. The spur gear mounting location is optimal for telemetry detection because the spur gear rotates at wheel speed, providing the most direct and accurate RPM data without the complexity of sensing motor speed and accounting for gear ratios. The included magnet sizes (5x2mm single piece, 3x8mm in a three-piece set, and 3x10mm in a three-piece set) are precisely calibrated for reliable detection at high rotation speeds, with the smaller magnets suited to 1/16 scale models running at lower absolute RPMs and the larger 3x8mm and 3x10mm options providing enhanced signal strength for 1/10 scale vehicles operating at higher speeds. The CCS fasteners are stainless steel and designed to resist corrosion from moisture and salt exposure, critical for UK-based operators who may run their RC cars in wet conditions or near coastal areas. Installation is straightforward for users comfortable with basic RC maintenance, requiring only standard metric hex drivers and basic mechanical knowledge.

What's in the Box

• 1/16 scale telemetry magnet holder with 5x2mm magnet (1 piece)
• 1/10 scale telemetry magnet holder with larger magnet cavity
• 3x8mm CCS stainless steel countersunk screws (3 pieces)
• 3x10mm CCS stainless steel countersunk screws (3 pieces)

What You Need to Complete

• RPM sensor (sold separately) — required to detect the magnet and convert rotation into speed data
• Traxxas TQi 2.4GHz radio transmitter with telemetry capability (sold separately)
• Traxxas Link Wireless Module 6511 (sold separately) — enables wireless telemetry transmission from receiver to your mobile device
• Traxxas Link mobile app (free download) — displays real-time RPM, speed, temperature, voltage and performance metrics
• Compatible Traxxas RC model such as Rustler Ultimate VXL, Spartan SR VXL, or TRX4 series (must have suitable motor and drivetrain)

Frequently Asked Questions

• Does the Traxxas telemetry magnet holder work with all Traxxas RC models? — No, telemetry compatibility depends on several factors. The magnet holder itself fits models with spur gears of the appropriate size (1/10 scale or 1/16 scale), but you also need a compatible RPM sensor and a Traxxas TQi radio system with the 6511 Traxxas Link Wireless Module to complete the telemetry system. Popular compatible models include the Rustler Ultimate VXL 4x4, Spartan SR VXL 1/10 racing boat, and various TRX4 trail crawlers, though we recommend checking your specific model's compatibility before purchasing.
• What is the difference between the two magnet holder sizes included in TRX6538? — The package includes both a smaller 1/16 scale magnet holder with a 5x2mm magnet, designed for compact brushless RC cars with correspondingly smaller spur gears, and a larger 1/10 scale magnet holder with cavity for the larger 3x8mm or 3x10mm magnets, suited to full-size 1/10 scale RC trucks, buggies, and racing boats. Choose the size matching your vehicle's spur gear dimensions.
• How accurate is the telemetry data from these magnet holders? — Extremely accurate when properly installed. The magnet detects each individual spur gear tooth rotation, providing wheel-speed RPM data without any estimation or calculation. This direct measurement approach is more accurate than motor RPM sensing because it accounts for all drivetrain components and gear reduction, giving you the true wheel speed your RC car is actually achieving.
• Can I use these magnet holders on a brushless motor for telemetry? — No, these specific holders are designed for spur gear mounting only. If you want motor RPM telemetry, you would need a different sensor type mounted directly to the motor shaft. However, spur gear telemetry provides more useful real-world performance data because it measures actual wheel speed rather than motor speed.
• Do I need to replace these magnets periodically? — Stainless steel neodymium magnets are extremely durable and do not lose magnetic strength under normal RC operating conditions. These magnets should last the lifetime of your RC model. The only reason to replace them would be accidental physical damage or loss during installation.
• What is the Traxxas Link app and what can it display? — Traxxas Link is a free mobile application (iOS and Android) that connects to your Traxxas TQi radio via the 6511 Wireless Module. It displays real-time telemetry including RPM, speed, battery voltage, receiver signal strength, and motor temperature. You can also review logged data after your run to analyse performance, identify acceleration points, and optimise your driving technique.
• Is professional installation required for the magnet holder? — No, installation is straightforward for anyone comfortable performing basic RC maintenance. You'll need to remove your spur gear or access it from the chassis, position the appropriate magnet holder, and secure it with the included CCS screws. Most users can complete installation in 10-15 minutes with standard metric hex tools.
• Will these magnet holders add noticeable weight to my RC car? — Negligible. The magnet holder and magnet combined weigh only a few grams, an insignificant amount compared to your vehicle's total mass. This minimal weight addition means no performance penalty and no need to rebalance your chassis or adjust suspension settings.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Traxxas Telemetry trigger magnet holders, spur gear / magnet, 5x2mm (1pc) / 3x8mm CCS (3 pcs) / 3x10mm CCS (3 pcs) TRX6538 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.