- Part type: Transmission gear
- Tooth count: 29T
- Tooth profile: MOD1
- Bore diameter: 8mm
- Material: Steel
- Includes: 1 x M4 x 4mm set screw, 1 x M4 screw pin
- Compatible with: ARRMA 1/7 scale models with 8mm bore shafts
- Fitment - ARRMA ARA7617V2 Felony 6S AVC: Standard part
- Fitment - ARRMA ARA109001 Infraction 6S: Standard part
- Fitment - ARRMA ARA7615V2 Infraction 6S AVC: Standard part
- Fitment - ARRMA ARA7116V2 Limitless 6S: Standard part
- Fitment - ARRMA ARA109011 Limitless 6S: Standard part
- ARRMA part number: ARA310950
- Manufacturer: ARRMA
Overview
The ARRMA 29T MOD1 Spool Gear (8mm Bore) is a precision-engineered replacement part designed for serious RC enthusiasts who demand fine control over their vehicle's gearing and performance. Whether you're running an ARRMA 1/7 scale brushless RC monster truck, street bash machine, or all-road performance vehicle, this spool gear allows you to optimise your transmission setup for different track conditions and driving styles. As an authorised ARRMA dealer in the UK, RC Model Shop stocks genuine OEM parts like this to ensure your RC car UK setup remains in peak condition.
This 29-tooth MOD1 profile gear is manufactured to the exacting standards ARRMA is recognised for, combining durability with precision engineering. Whether you're a competitive racer fine-tuning your 1/7 brushless RC car for championship performance, or a weekend basher looking to upgrade your transmission, this spool gear delivers the reliability and accuracy you need. The MOD1 tooth profile has become the standard across modern high-performance RC vehicles, making this gear a direct fit for numerous ARRMA platforms.
With a 5-star customer rating on the official ARRMA store, this component has earned trust from the RC community. The inclusion of all necessary fasteners—M4 set screws and screw pin—means you have everything required for installation, making this an easy upgrade or replacement for your existing setup.
Key Features
- Strong steel construction — Manufactured from durable steel for long-lasting performance even in extreme RC conditions, ensuring the gear can handle the high torque and stress from brushless motors in 1/7 scale vehicles without stripping or fracturing under load.
- Precision-manufactured tooth profile — The MOD1 tooth geometry is engineered for smooth, efficient power transfer and minimal backlash, which translates to better acceleration response, cleaner gear engagement, and improved overall vehicle handling characteristics.
- Precision-engineered set screw holes — Specially machined holes on either side of the spool shaft ensure screws seat perfectly and lock the gear securely in place, preventing the gear from slipping or rotating on the shaft during aggressive driving or high-speed runs.
- 8mm bore diameter — Compatible with standard 8mm diameter shafts found on ARRMA 1/7 scale models including the Felony, Infraction, and Limitless ranges, ensuring a direct fit without modification or adapter sleeves.
- Complete installation package — Includes one 29T MOD1 spool gear plus M4 x 4mm set screw and M4 screw pin, so you have all the fasteners needed for a straightforward installation without hunting for compatible screws.
Technical Performance
The ARRMA 29T MOD1 Spool Gear represents the pinnacle of transmission component engineering for high-performance RC vehicles. At 29 teeth, this gear sits in the mid-range of ARRMA's spool gear selection, offering a balanced compromise between acceleration and top-end speed—ideal for drivers who want flexibility across various track layouts and driving conditions. The MOD1 tooth profile has become the industry standard for modern 1/7 scale brushless RC cars because it delivers superior mesh characteristics with pinion gears, reducing noise, heat generation, and mechanical loss that would otherwise rob your vehicle of power and efficiency. The steel construction ensures longevity under the extreme demands of brushless motor systems, which routinely deliver massive power and torque to the drivetrain. Precision manufacturing of the tooth geometry guarantees consistent performance and reliable engagement, while the carefully engineered set screw holes provide a secure mounting interface that prevents gear slip. The 8mm bore is the standard shaft diameter for ARRMA's 1/7 scale transmission system, making this gear directly compatible with vehicles like the Felony 6S, Infraction 6S, and Limitless 6S ranges. Whether you're upgrading from an older setup or replacing a worn component, this spool gear will restore your transmission to factory specifications and maintain the performance characteristics your vehicle was engineered to deliver.
What's in the Box
- 1 x 29T MOD1 Spool Gear (8mm bore)
- 1 x M4 x 4mm Set Screw
- 1 x M4 Screw Pin
Frequently Asked Questions
- Which ARRMA models is this 29T MOD1 spool gear compatible with? — This gear is designed for ARRMA 1/7 scale vehicles with 8mm bore shafts. It is listed as a standard part for the ARA7617V2 Felony 6S AVC, ARA109001 Infraction 6S, ARA7615V2 Infraction 6S AVC, ARA7116V2 Limitless 6S, and ARA109011 Limitless 6S models. Always verify your specific model's transmission compatibility before purchasing.
- What does the 29T rating mean on this spool gear? — The 29T designation refers to the number of teeth on the gear. More teeth mean higher top speed but slower acceleration, whilst fewer teeth improve acceleration but reduce maximum velocity. The 29-tooth configuration offers a balanced middle ground suitable for diverse driving styles and track conditions.
- Do I need any additional parts to install this gear? — No. The package includes everything you need: the spool gear itself plus the M4 x 4mm set screw and M4 screw pin required for secure installation. You will need basic RC tools such as a hex key set or ball driver to remove the old gear and install the new one.
- What is MOD1 tooth profile and why does it matter? — MOD1 refers to a standardised tooth geometry that has become the industry standard for modern RC gears. This profile optimises the contact pattern between the spool gear and pinion gear, resulting in smoother meshing, less noise, reduced heat, and improved efficiency. MOD1 gears are found on most contemporary high-performance RC vehicles, making them the correct specification for your ARRMA platform.
- Can I use different tooth counts to adjust my vehicle's performance? — Yes. ARRMA offers spool gears in various tooth counts. Upgrading to more teeth increases top speed but reduces acceleration, whilst downgrading to fewer teeth improves acceleration but caps maximum velocity. Experiment with different ratios to tune your vehicle for specific tracks or your personal driving preferences, but always ensure the bore diameter (8mm in this case) matches your shaft.
- Is this a genuine ARRMA part? — Yes. The ARRMA # ARA310950 is the official manufacturer part number. When purchasing from RC Model Shop, you are guaranteed an authentic ARRMA component manufactured to the brand's exacting quality standards.
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 ARRMA 29T MOD1 Spool Gear (8mm Bore) Z-ARA310950 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.
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