RC4WD INTERNAL GEAR SET FOR R3 SINGLE SPEED TRANSMISSION Z-G0070

Overview

The RC4WD Internal Gear Set for R3 Single Speed Transmission (Z-G0070) is a precision-engineered replacement and upgrade component designed for serious RC enthusiasts in the UK who demand reliability and performance from their scale RC models. This robust internal gear set represents the pinnacle of RC transmission technology, crafted with meticulous attention to detail and built to withstand the demands of challenging terrain and extended use. Whether you're upgrading an existing R3 transmission or building a complete scale RC crawler from scratch, this gear set delivers the controlled power delivery and mechanical reliability that makes RC model building so rewarding.

For anyone operating an R3 Single Speed Transmission in their RC car or truck, this internal gear set is an essential component that ensures smooth, consistent drive characteristics and longevity under real-world driving conditions. RC enthusiasts across the UK who specialise in scale RC models know that transmission reliability directly impacts overall vehicle performance, handling predictability and durability during extended bashings or competition events. The Z-G0070 stands out in the market as a precision component that combines advanced manufacturing techniques with premium materials to deliver exceptional value and performance.

This gear set is particularly appealing to experienced RC builders and those upgrading their existing transmissions to achieve better performance characteristics. The combination of CNC precision manufacturing, heat-treated steel construction and carefully engineered gear ratios means you're investing in a component that will enhance your RC experience for years to come. RC Model Shop stocks this authentic RC4WD product as part of our comprehensive range of RC spares and upgrades for all the major brands, ensuring UK customers have access to genuine, authorised components.

Key Features

• CNC Machined Construction — Every internal gear is manufactured using computer numerical control machining, which ensures tolerances are held to exacting standards and that every component fits perfectly within your transmission assembly. This precision engineering eliminates slop, inconsistent meshing and premature wear, delivering smooth, reliable power transfer every time you drive.
• Heat-Treated Hardened 45# Steel — The internal gears are crafted from premium 45# steel that undergoes specialised heat treatment and hardening processes, creating a material that resists wear, fatigue and damage from impacts or sustained high-stress driving. This material science approach means your gears maintain their geometry and performance characteristics far longer than untreated alternatives, representing better value over the lifetime of your RC model.
• Black Coated Finish — A protective black coating is applied to all steel components, providing corrosion resistance and aesthetic appeal while helping to identify this as a premium RC component. The coating protects against moisture, dust and the general wear that comes with outdoor RC use, particularly important for UK drivers who frequently encounter wet conditions and challenging terrain.
• 1.78:1 Gear Ratio — This carefully engineered ratio strikes the perfect balance between torque multiplication and speed delivery, providing controlled and reliable power characteristics that work beautifully within the R3 Single Speed Transmission system. The ratio is optimised for scale crawling applications where modulated power delivery and predictable acceleration are more valuable than raw top-end speed.
• Wide Steel 0.32 Pinion Gear — The pinion gear is manufactured from steel and features an increased width profile, which spreads gear mesh loads across a larger surface area and dramatically improves durability and longevity. The wider pinion design reduces stress concentration, decreases noise during operation and provides the consistent power delivery that serious RC enthusiasts demand from their transmissions.
• Delrin Spur Gear — The spur gear component is manufactured from Delrin, an advanced engineered polymer that offers excellent wear resistance, low friction characteristics and inherent damping properties that absorb vibration and reduce mechanical noise. This material choice alongside the steel pinion creates an optimal pairing that balances durability with smooth, responsive power delivery throughout your driving sessions.
• Lightweight Design at 75 Grams — Weighing just 2.65 ounces (75 grams), this internal gear set maintains a light overall weight that contributes to responsive handling and reduced stress on drive components throughout your RC transmission and drivetrain. The weight efficiency doesn't compromise durability or performance; instead, it represents intelligent engineering that optimises the power-to-weight ratio of your complete RC model.

Technical Performance

The RC4WD Internal Gear Set Z-G0070 represents a significant step forward in transmission component engineering for scale RC models. The CNC machining process produces internal gears with tolerances measured in fractions of a millimetre, ensuring that meshing between the 0.32 steel pinion gear and the Delrin spur gear is perfectly aligned and consistent. This precision translates directly to smooth power delivery, reduced backlash and quieter operation compared to standard or worn transmission components. The 1.78:1 gear ratio is specifically engineered for the R3 Single Speed Transmission platform, optimising the mechanical advantage and ensuring that power from your motor is delivered in a controlled, modulated fashion—ideal for technical scale RC driving where finesse and control matter more than outright speed. The combination of heat-treated hardened 45# steel in the pinion gear and Delrin in the spur gear creates an ideal material pairing: the steel provides hardness, wear resistance and durability against the high contact stresses at the gear mesh, whilst the Delrin contributes compliance, vibration damping and smooth engagement characteristics. This material science approach has been proven in demanding RC applications throughout the UK and globally. The black protective coating adds another layer of longevity by shielding steel surfaces from moisture and corrosion, particularly important for RC enthusiasts in the wetter UK climate who frequently tackle muddy terrain and water crossings. At just 75 grams, this internal gear set adds minimal weight to your transmission assembly, helping to keep your overall RC model responsive and agile. Whether you're upgrading an existing transmission or assembling a complete R3 system from component parts, this gear set will provide years of reliable service and consistent performance.

What's in the Box

• 1x Internal Gear Set for R3 Single Speed Transmission

What You Need to Complete

• RC4WD R3 Scale Single Speed Transmission (Z-U0028) — the complete transmission housing and assembly that this internal gear set is designed for

Frequently Asked Questions

• What is the RC4WD Internal Gear Set Z-G0070 used for? — This internal gear set is a replacement and upgrade component for the RC4WD R3 Single Speed Transmission system. It contains the primary internal gears that transfer power from the motor to the drivetrain, and serves as either a replacement for worn components or an upgrade to enhance transmission performance and reliability in your existing RC model.
• What transmission does this gear set fit? — The Z-G0070 internal gear set is specifically designed for the RC4WD R3 Scale Single Speed Transmission (model Z-U0028). It will not fit other transmission systems, so ensuring compatibility with your current transmission before ordering is essential.
• Is this suitable for beginners? — Whilst this is a high-quality component, it is primarily designed as a replacement or upgrade part rather than a complete beginner-friendly kit. Beginners would typically purchase a complete R3 transmission assembly rather than individual internal gear components. However, if you're a beginner with some mechanical experience and you're comfortable working with transmission assemblies, this component can help you maintain or upgrade your existing R3 transmission system.
• What makes this gear set more durable than standard alternatives? — The Z-G0070 combines several durability advantages: CNC precision machining eliminates defects and ensures perfect fitment; heat treatment and hardening of the 45# steel pinion gear dramatically increases wear resistance; the Delrin spur gear provides excellent durability with inherent vibration damping; and the black protective coating resists corrosion. These engineering choices collectively extend the operational lifespan of your transmission compared to non-engineered or worn alternatives.
• What is the 1.78:1 gear ratio optimised for? — The 1.78:1 ratio is engineered to provide controlled, modulated power delivery ideal for scale RC crawling and technical driving applications where precision and control matter more than outright speed. This ratio multiplies torque from your motor effectively whilst maintaining responsive throttle characteristics that allow you to navigate challenging terrain with finesse.
• Will this improve my RC transmission performance? — If you're replacing worn or damaged internal gears in an existing transmission, the Z-G0070 will restore and enhance performance by providing fresh, precisely manufactured components with no wear or damage. The high-quality materials and construction will improve smoothness, reduce noise and extend overall transmission lifespan. If your transmission is already in good condition, upgrading to this component may provide subtle refinements in engagement smoothness and longevity.
• How much does this internal gear set weigh? — The complete internal gear set weighs just 75 grams (2.65 ounces), making it a lightweight yet durable solution that won't significantly impact your RC model's overall weight or handling characteristics.

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 RC4WD INTERNAL GEAR SET FOR R3 SINGLE SPEED TRANSMISSION Z-G0070 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.