{"product_id":"smoker-performance-mini-sprocket-hub","title":"Smoker Performance Mini Sprocket Hub","description":"\u003cp\u003eThe Mini Sprocket Hub from Smoker Performance is the machined part that securely mounts your rear sprocket to the axle on a 4-stroke kart. Newer drivers often wonder how they can change gear ratios quickly between races. This billet hub makes it simple: just unbolt one sprocket and bolt on another without removing the entire assembly.\u003c\/p\u003e\u003cp\u003eMachined from 7075 aluminum with a split-clamp design and keyway, the hub delivers precise fitment and reliable power transfer. Racers running 4-stroke classes choose between titanium hardware for every last gram of weight savings or steel hardware when they want maximum durability at a lower price. The full system (hub plus sprocket plus guard) weighs just 15 oz.\u003c\/p\u003e\u003cdiv class=\"tip-block\"\u003e\n\u003cstrong\u003eInstallation Tips:\u003c\/strong\u003e \u003cem\u003eClean the axle thoroughly and apply a light coat of anti-seize before sliding the mini sprocket hub into place. This prevents corrosion and makes future sprocket changes much easier on 30mm, 40mm or 50mm kart axles.\u003c\/em\u003e\n\u003c\/div\u003e\u003cp\u003eIt works with all Smoker Performance #219 and #35 ultra-light sprockets from 42T through 85T. The carbon fiber sprocket guard shown in the lifestyle image is sold separately.\u003c\/p\u003e\u003cp\u003eChoose your axle bore and hardware below. Whether you are just getting into karting or chasing tenths at the national level, this hub gives you fast, repeatable gearing adjustments that fit your exact axle size.\u003c\/p\u003e\u003cdiv class=\"tip-block\"\u003e\n\u003cstrong\u003eInstallation Tips:\u003c\/strong\u003e \u003cem\u003eTorque the pinch bolts in a criss-cross pattern using a calibrated torque wrench. Proper clamping force on the keyway prevents slippage under heavy 4-stroke torque loads while protecting your axle from damage.\u003c\/em\u003e\n\u003c\/div\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBillet 7075 Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAxle Bore Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30mm, 40mm, 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTitanium or Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Chain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e#219 and #35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull System Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 oz (hub + sprocket + guard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"margin:28px 0;padding:18px 20px;background:#f5fbf7;border-left:4px solid #2a8a4a;border-radius:0 8px 8px 0;\"\u003e\n  \u003cp style=\"font-weight:700;margin:0 0 14px 0;color:#1a5c30;font-size:1.02em;\"\u003e✓ Product Highlights\u003c\/p\u003e\n  \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eBillet 7075 aluminum hub mounts rear sprockets to the kart axle.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eSplit clamp design with keyway ensures secure power transfer on 4-stroke karts.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eAvailable with 30 mm, 40 mm, or 50 mm axle bore options.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eChoose titanium hardware for minimum weight or steel hardware for added durability.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eWorks with both #219 and #35 chain sprockets from Smoker Performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eCompatible with Smoker two-piece sprockets sized 42-66 tooth and one-piece 67-85 tooth.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eFull assembly including sprocket and guard weighs 15 oz.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"padding:6px 0;display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #e8f4ec;\"\u003e\n\u003cspan style=\"color:#2a8a4a;font-weight:bold;flex-shrink:0;font-size:1em;\"\u003e✓\u003c\/span\u003e\u003cspan style=\"font-size:0.93em;\"\u003eCarbon fiber guard shown is available separately for chain protection.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Smoker Performance","offers":[{"title":"30mm Titanium Hardware","offer_id":53416976154942,"sku":"SK-Smoker-Hub-30-Ti","price":103.0,"currency_code":"USD","in_stock":true},{"title":"40mm Titanium Hardware","offer_id":53416976187710,"sku":"SK-Smoker-Hub-40-Ti","price":103.0,"currency_code":"USD","in_stock":true},{"title":"50mm Titanium Hardware","offer_id":53416976220478,"sku":"SK-Smoker-Hub-50-Ti","price":103.0,"currency_code":"USD","in_stock":true},{"title":"30mm Steel Hardware","offer_id":53416976253246,"sku":"SK-Smoker-Hub-30-St","price":73.0,"currency_code":"USD","in_stock":true},{"title":"40mm Steel Hardware","offer_id":53416976286014,"sku":"SK-Smoker-Hub-40-St","price":73.0,"currency_code":"USD","in_stock":true},{"title":"50mm Steel Hardware","offer_id":53416976318782,"sku":"SK-Smoker-Hub-50-St","price":73.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/smoker-mini-sprocket-hub-three-quarter.jpg?v=1777656760","url":"https:\/\/swiftkarting.com\/products\/smoker-performance-mini-sprocket-hub","provider":"Swift Karting","version":"1.0","type":"link"}