RC Overhaul Pinion Gear 16T M0.5 Chromium Steel Arrma Granite Grom G-RCO-AR032-16

• Product Type: Replacement Pinion Gear
• Brand: RC Overhaul
• Model Number: G-RCO-AR032-16
• Tooth Count: 16T
• Module Pitch: M0.5
• Motor Shaft Diameter: 2.3mm
• Material: Chromium Steel
• Finish: Black (Corrosion-Resistant)
• Compatibility: Arrma Granite GROM 1:18 Scale RC Car
• Installation Type: Direct Replacement (No Modifications Required)
• Included Fastener: M3 x 4mm Set Screw
• Gear Ratio Configuration: M0.5 Module
• Precision Engineered: Yes
• Corrosion Resistance: Yes

Overview

The RCO Pinion 16T (M0.5, 2.3mm Shaft) is a premium replacement pinion gear designed specifically for the Arrma Granite GROM 1:18 scale RC car. If you're looking to upgrade or maintain your RC car in the UK, this chromium steel pinion represents a significant step up from stock brushed components. Built with performance and durability in mind, this gear is perfect for RC enthusiasts who want to keep their Grom running at peak efficiency whilst enjoying the benefits of superior corrosion resistance and a professional black finish.

Whether you're a seasoned RC competitor, a weekend basher, or someone who has recently discovered the exciting world of RC cars, having quality replacement parts on hand is essential. The RCO Pinion 16T offers genuine performance gains over stock gearbox components, ensuring smooth power delivery from your motor to the wheels. With its robust chromium steel construction and precision engineering, this pinion gear is built to withstand the demands of serious RC driving whilst maintaining reliability through season after season of use.

This is a direct replacement for the stock Granite GROM pinion and comes ready to install with no modifications required. For RC car enthusiasts in the UK seeking trusted spares and upgrades for their Grom, this pinion gear delivers excellent value and performance. It's the kind of upgrade that serious RC hobbyists recommend to each other because it genuinely improves reliability and longevity of the drivetrain.

Key Features

• Chromium Steel Construction — This pinion gear is manufactured from chromium steel, which provides exceptional strength and durability compared to standard steel alternatives. The chromium plating also creates a black finish that resists corrosion, meaning your pinion will maintain its appearance and performance even after extensive use in various weather conditions across the UK.
• M0.5 Mod Pitch — The 0.5 module pitch is precision-engineered to mesh perfectly with the Granite GROM's spur gear for smooth, efficient power transmission with minimal vibration or noise during operation.
• 2.3mm Motor Shaft Compatibility — Engineered specifically for motors with a 2.3mm shaft, this pinion integrates seamlessly with the Granite GROM's motor setup without requiring any shaft modifications or adapters.
• Direct Replacement Design — This pinion is a direct replacement for the stock brushed Grom pinions, meaning installation is straightforward with no modifications to your gearbox required, making it ideal for upgrades or routine maintenance.
• Corrosion-Resistant Black Finish — The chromium steel construction gives this gear a professional black finish that not only looks great but actively protects the metal underneath from rust and corrosion, extending the service life of your component.
• Precision Machining — Each 16-tooth pinion is precision-engineered to exacting tolerances, ensuring consistent engagement with your spur gear and delivering smooth, reliable performance through thousands of hours of driving.
• Included M3 x 4mm Set Screw — The package includes an M3 x 4mm set screw specifically sized for secure attachment to your 2.3mm motor shaft, ensuring the pinion stays firmly in place during aggressive driving.

Technical Performance

The RCO Pinion 16T represents a genuine performance upgrade over stock pinion gears fitted to the Arrma Granite GROM. By selecting a chromium steel construction, RC Overhaul has created a gear that combines superior strength with enhanced surface protection. The M0.5 module pitch is precision-engineered to ensure perfect meshing with your Granite GROM's spur gear, delivering efficient power transmission from the brushless or brushed motor directly to the wheels with minimal energy loss. The 16-tooth configuration provides a specific gear ratio that balances acceleration and top speed for typical Granite GROM applications. The 2.3mm shaft diameter is industry-standard for compact 1:18 scale motors, ensuring compatibility with the vast majority of aftermarket motor upgrades available for this platform. The chromium plating creates a naturally black finish that resists corrosion far better than bare steel, which is particularly important for UK-based RC enthusiasts who frequently encounter damp conditions. Quality pinion gears are critical to overall drivetrain longevity; a worn or damaged pinion will cause increased vibration, inefficient power delivery, and premature wear to your spur gear. By upgrading to this precision-engineered RCO pinion, you're investing in smoother, more reliable performance and extending the service life of your entire drivetrain.

What's in the Box

• 1x 16T Mod 0.5 Pinion Gear (Chromium Steel)
• 1x M3 x 4mm Set Screw

Frequently Asked Questions

• Is the RCO Pinion 16T compatible with my Arrma Granite GROM? — Yes, this pinion is engineered as a direct replacement for the stock Granite GROM pinion. The M0.5 module pitch and 2.3mm shaft diameter are specifically designed to fit the Grom's motor and gearbox. However, we always recommend checking your vehicle's manual using the part number to confirm fitment if you're unsure, or contacting our knowledgeable team via WhatsApp or phone for specific compatibility advice.
• What are the advantages of chromium steel over the stock pinion? — Chromium steel is significantly stronger than the brushed steel used in stock pinions, making it more resistant to wear and stripping of the teeth. The chromium plating also creates a corrosion-resistant black finish that protects the underlying metal, extending the lifespan of your pinion dramatically. For UK RC enthusiasts who drive in variable weather conditions, this corrosion resistance is a genuine practical benefit.
• Can I use different tooth counts with this gearbox? — RC Overhaul produces this pinion in multiple tooth configurations: 16T, 18T, 20T, and 22T. Each tooth count produces a different gear ratio, affecting acceleration and top speed characteristics. The 16T offers maximum acceleration, whilst higher tooth counts prioritise top speed. All versions are compatible with the Granite GROM and use the same M0.5 module pitch and 2.3mm shaft.
• How often should I replace my pinion gear? — Pinion gear replacement intervals depend on how frequently you drive and how aggressively you operate your RC car. For casual weekend bashers, a quality pinion like this RCO unit will typically last many months of regular use. For competitive racing or intensive daily use, you might consider inspecting and potentially replacing your pinion every 3-6 months. Signs of wear include visible tooth damage, increased noise during acceleration, or loss of smooth power delivery.
• Is installation difficult? — No, installation is straightforward and requires only basic tools. Simply remove your motor, slide the pinion onto the 2.3mm shaft, align it with your spur gear, and tighten the included M3 x 4mm set screw. Most RC enthusiasts can complete the swap in under five minutes. If you're unsure about installation, our experienced team at RC Model Shop are always happy to provide step-by-step guidance.
• Why would I choose this over the stock pinion? — The stock Granite GROM pinion is adequate for casual driving, but this RCO pinion offers measurable advantages: superior durability thanks to chromium steel construction, corrosion resistance for UK weather conditions, and precision engineering that delivers smoother meshing with your spur gear. For anyone serious about keeping their Grom running reliably, this upgrade is genuinely worthwhile and represents excellent value for money.

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 RCO Pinion 16T (M0.5, 2.3mm Shaft) G-RCO-AR032-16 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.

We want to make sure your delivery goes smoothly, so here are some important details about our service:

• For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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• If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
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• For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.