Overview
The HOBAO HYPER SS/SST/GTS/GTB NEW CROWN GEAR 43T (H85101) is an essential replacement and upgrade component for serious RC enthusiasts running HOBAO's acclaimed 1/8 scale high-performance vehicles. Whether you're piloting a Hyper SS buggy, SST truggy, GTS on-road racer, or GTB electric model, this crown gear delivers the precision engineering and durability that competitive RC racing demands. This gasket version crown gear is manufactured to OEM specifications and represents the quality standard HOBAO is recognised for across the global RC car UK community and beyond.
Crown gears are critical components in your RC vehicle's differential housing, responsible for transmitting power from the driveshaft to the axle shafts whilst allowing for smooth cornering and acceleration. The 43-tooth configuration provides the optimal balance of power delivery and acceleration characteristics for 1/8 scale racing applications. Whether you're replacing a worn component, upgrading your differential setup, or building a competition-grade vehicle from the ground up, this HOBAO crown gear ensures your differential system operates at peak efficiency.
Compatible with both nitro and electric variants of the HOBAO HYPER range, this crown gear works seamlessly with differential housings #85100 and #85110, making it an indispensable spare part for any serious RC competitor or weekend basher who demands reliability and performance from their RC hobby equipment.
Key Features
- 43-Tooth Configuration — The 43-tooth count is engineered specifically for 1/8 scale HOBAO HYPER models, providing the ideal gear ratio for balanced acceleration and top-end performance across both nitro and electric powertrains, ensuring optimal driveline responsiveness in competitive racing scenarios.
- Gasket Version Design — This crown gear features gasket-compatible engineering that works flawlessly with HOBAO's differential housing sealing systems, preventing differential fluid leakage and maintaining consistent lubrication performance throughout extended racing sessions.
- Universal Compatibility Across HYPER Range — Fits multiple HOBAO HYPER models including the SS buggy, SST truggy, GTS on-road racer, and GTB electric variant, making this a versatile upgrade option for builders running multiple vehicles or switching between platforms.
- Nitro and Electric Compatible — Whether your HYPER model runs a nitro engine or brushless electric motor, this crown gear performs identically, allowing you to share spare parts across your fleet of RC vehicles regardless of power source.
- Works with Differential Housings #85100 and #85110 — Direct compatibility with these proven HOBAO differential housing units ensures bolt-on installation without modification, saving time and frustration during maintenance or upgrades.
- OEM HOBAO Manufacturing — Built to the same exacting standards as HOBAO's original equipment, this crown gear maintains the precision tolerances and material quality necessary for reliable high-performance RC racing.
- Essential Replacement Component — Crown gears experience wear during competitive use and aggressive driving; keeping spare H85101 units on hand ensures you're never sidelined during race day or practice sessions.
Technical Performance
The crown gear is a precision-engineered drivetrain component that demands exceptional build quality and material selection, and HOBAO delivers on both fronts with this H85101 unit. The 43-tooth crown gear works in conjunction with the differential housing to create a robust power transmission system capable of handling the extreme forces generated by high-powered 1/8 scale RC racing vehicles. In nitro-powered HYPER models, the crown gear must manage sudden torque spikes and sustained high-RPM operation, whilst electric variants place different demands on the component through continuous smooth power delivery from brushless motors. The gasket version design incorporates precision-machined sealing surfaces that work with HOBAO's differential housing sealing systems to maintain proper lubrication levels, preventing fluid loss that could lead to premature wear or catastrophic drivetrain failure. Material composition and heat treatment are critical factors in crown gear longevity; HOBAO's engineering ensures this component resists wear, stripping, and breakage under the demanding conditions of competitive 1/8 scale racing. The 43-tooth configuration has been specifically selected for the HYPER range to optimise the power band characteristics of these vehicles, delivering the acceleration off the line that competitive racing demands whilst maintaining enough top-end velocity for high-speed sections of race tracks. Whether you're running on road courses, off-road circuits, or tight indoor tracks, this crown gear provides the durability and performance consistency that separates winning setups from mediocre ones.
What's in the Box
- HOBAO HYPER SS/SST/GTS/GTB NEW CROWN GEAR 43T (H85101) x1
What You Need to Complete
- HOBAO HYPER differential housing #85100 or #85110 (if not already installed)
- Appropriate differential fluid for your model variant
- Basic RC tools for installation (small hex keys, screwdrivers)
Frequently Asked Questions
- What is a crown gear and why do I need to replace it? — A crown gear is the main power transmission component in your RC vehicle's differential, responsible for transferring engine or motor power to the drive axles. Over time, crown gears experience wear from constant rotation and power cycling, particularly under competitive racing conditions. If you notice grinding noises, poor acceleration response, or differential fluid leaks, your crown gear may require replacement. This H85101 crown gear is an exact replacement that restores your differential to factory performance specifications.
- Is this crown gear suitable for both nitro and electric HOBAO HYPER models? — Yes, the H85101 is fully compatible with both nitro-powered and brushless electric variants of the HOBAO HYPER SS, SST, GTS, and GTB models. The crown gear operates identically regardless of your vehicle's power source, making this a universal spare part for multi-model HOBAO racing fleets.
- Which differential housings does this crown gear fit? — This H85101 crown gear is specifically engineered for HOBAO differential housings #85100 and #85110. Before ordering, verify your vehicle is equipped with one of these differential housing variants to ensure proper fit and function.
- What makes the gasket version different from standard crown gears? — The gasket version features precision-engineered sealing surfaces that integrate with HOBAO's differential housing gasket systems, creating a superior seal that prevents differential fluid leakage. This design maintains consistent lubrication levels throughout extended racing sessions, extending the lifespan of all differential components and improving reliability during competitive events.
- How do I install this crown gear? — Installation requires removing your differential housing and carefully extracting the worn crown gear whilst noting the orientation of internal components. The new H85101 crown gear can then be installed in reverse sequence, ensuring proper seating within the differential housing. A detailed installation guide is available in the HOBAO user manual for your specific model.
- Is this an OEM HOBAO part? — Yes, the H85101 is manufactured by HOBAO USA to original equipment specifications, ensuring perfect fitment and performance compatibility with your HYPER model and differential housing.
- Why should I keep spare crown gears in my pit box? — Crown gears are wear items that can strip or break under extreme racing conditions, particularly if your differential takes a hard impact or if the vehicle experiences sudden torque spikes. Having a spare H85101 on hand ensures you can complete repairs quickly during race day, minimising downtime and maximising your track time.
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 HOBAO HYPER SS/SST/GTS/GTB NEW CROWN GEAR 43T FOR 85100/85110 H85101 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.
- Product Type: Crown Gear (Differential Component)
- Brand: HOBAO USA
- Model Number: H85101
- Tooth Count: 43T
- Version: Gasket Version
- Compatible Vehicle Models: HOBAO HYPER SS, HOBAO HYPER SST, HOBAO HYPER GTS, HOBAO HYPER GTB
- Compatible Scale: 1/8
- Powerplant Compatibility: Nitro and Electric
- Compatible Differential Housings: #85100, #85110
- Manufacturer: HOBAO USA
- OEM Specification: Yes
- Quantity in Box: 1
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