{"product_id":"hsp-steel-spur-differential-main-gear-pinion-17t-21t-26t-29t-64t","title":"HSP Steel Spur Differential \u0026 Pinion Gear 17T\/21T\/26T\/29T\/64T","description":"\n\u003ch2\u003eHSP Steel Spur Differential Main Gear \u0026amp; Pinion Gear Set\u003c\/h2\u003e\n\u003cp\u003eKeep your RC car running at peak performance with this precision-cast steel spur differential main gear and pinion gear set, designed specifically for HSP and Redcat 1\/10 scale RC models. Whether you're upgrading worn-out gears or building a custom RC drivetrain, this durable steel gear delivers smooth, reliable power transfer on and off the track.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Models\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e17T \u0026amp; 21T Pinion Gears:\u003c\/strong\u003e HSP 94111 \/ 94111PRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26T Pinion Gear:\u003c\/strong\u003e HSP 94107, 94170, 94123, 94103\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e29T Pinion Gear:\u003c\/strong\u003e Compatible with select HSP\/Redcat models\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e64T Main Differential Gear:\u003c\/strong\u003e Universal fit for 1\/10 scale HSP\/Redcat models — 94103, 94103PRO, 94107, 94107PRO, 94111, 94111PRO, 94170, 94170PRO\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium Steel Construction:\u003c\/strong\u003e Precision-cast steel for maximum durability and long-lasting wear resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpur \/ Ring Gear Profile:\u003c\/strong\u003e Engineered spur tooth profile ensures smooth, efficient gear mesh and consistent power delivery\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Tooth Options:\u003c\/strong\u003e Available in 17T, 21T, 26T, 29T (pinion) and 64T (main differential gear) to suit your specific build\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAperture:\u003c\/strong\u003e 3.17 mm bore for precise motor shaft fitment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e 100% brand new — drop-in fit for supported HSP and Redcat RC models\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Motor Pinion or Main Differential Gear (as selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual color may vary slightly from images due to monitor settings and lighting conditions. Please allow ±1–3 cm tolerance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which HSP RC models are compatible with this steel spur gear set?\u003c\/h4\u003e\n\u003cp\u003eA: This gear set is compatible with HSP and Redcat 1\/10 scale RC models including 94103, 94103PRO, 94107, 94107PRO, 94111, 94111PRO, 94170, and 94170PRO. The 17T and 21T pinion gears are specifically for the 94111\/94111PRO, while the 26T fits 94107, 94170, 94123, and 94103 models. The 64T main differential gear is universally compatible across 1\/10 scale HSP\/Redcat platforms.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the bore\/aperture size of the pinion gear?\u003c\/h4\u003e\n\u003cp\u003eA: The pinion gear features a 3.17 mm aperture (bore diameter), designed to fit standard motor shafts on compatible HSP and Redcat 1\/10 RC vehicles for a secure and precise fit.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this a direct replacement gear or does it require modification?\u003c\/h4\u003e\n\u003cp\u003eA: This is a direct drop-in replacement gear. It is precision-cast from steel and designed to meet OEM specifications for supported HSP and Redcat RC models, requiring no modification for installation.\u003c\/p\u003e\n\u003ch4\u003eQ: Why choose a steel gear over a stock plastic gear?\u003c\/h4\u003e\n\u003cp\u003eA: Steel spur and pinion gears offer significantly greater durability and wear resistance compared to standard plastic gears. They handle higher torque and heat generated during aggressive driving, extending the lifespan of your RC car's drivetrain and improving overall performance.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which HSP RC models are compatible with this steel spur gear set?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This gear set is compatible with HSP and Redcat 1\/10 scale RC models including 94103, 94103PRO, 94107, 94107PRO, 94111, 94111PRO, 94170, and 94170PRO. The 17T and 21T pinion gears are specifically for the 94111\/94111PRO, while the 26T fits 94107, 94170, 94123, and 94103 models. 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