{"product_id":"harddrive-transmission-sprocket-21t-big-twin-5-speed-1994-2006-500-820-54700","title":"Harddrive Transmission Sprocket - 21t BIG Twin 5 Speed 1994-2006 .500 — Harley-Davidson (1994-2006)","description":"\u003cp\u003eHarddrive 21-tooth transmission sprocket for Big Twin 5-speed models 1994-2006, precision-machined with hardened teeth for extended wear. Direct OEM replacement available in 1\/2-inch offset for accommodating wider tires without primary or transmission modifications.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e21-tooth count for Big Twin 5-speed\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined hardened steel teeth\u003c\/li\u003e\n  \u003cli\u003e1\/2-inch offset design\u003c\/li\u003e\n  \u003cli\u003eOEM replacement spec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harddrive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 191331\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 191361169380\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTooth Count:\u003c\/strong\u003e 21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOffset:\u003c\/strong\u003e 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5.25 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5.25 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 1.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.66 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China (Taiwan)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Big Twin 5-speed transmission 1994-2006.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this fit my Big Twin 6-speed?\u003c\/h3\u003e\n\u003cp\u003eNo — this sprocket is engineered for 5-speed transmissions only. 2007+ Big Twins with 6-speed boxes require a different part number.\u003c\/p\u003e\n\u003ch3\u003eWhat does 1\/2-inch offset mean?\u003c\/h3\u003e\n\u003cp\u003eThe offset allows you to fit a slightly wider rear tire without offsetting the primary or transmission case — ideal for custom tire upgrades.\u003c\/p\u003e\n\u003ch3\u003eHow long do these teeth last?\u003c\/h3\u003e\n\u003cp\u003eHarddrive uses hardened steel and precision machining for extended wear. Lifespan depends on riding style and maintenance; expect 15,000-30,000+ miles under normal conditions.\u003c\/p\u003e\n\u003ch3\u003eIs this a direct bolt-in replacement?\u003c\/h3\u003e\n\u003cp\u003eYes — bolt straight into your stock transmission basket. No modifications needed.\u003c\/p\u003e","brand":"Harddrive","offers":[{"title":"Default Title","offer_id":53035648319599,"sku":"820-54700","price":62.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/1617-5862dc5d33d04.jpg?v=1777529044","url":"https:\/\/vtwinbikers.com\/products\/harddrive-transmission-sprocket-21t-big-twin-5-speed-1994-2006-500-820-54700","provider":"Vtwinbikers","version":"1.0","type":"link"}