{"product_id":"rutu-atv-rear-sprocket-420-37t-48mm-68mm-bolt-spacing-heat-treated-steel-with-mounting-screws","title":"RUTU ATV Rear Sprocket 420 37T - 48mm\/68mm Bolt Spacing, Heat-Treated Steel with Mounting Screws","description":"\u003cp\u003e\u003cstrong\u003eRUTU's 420 37T ATV rear sprocket is a heat-treated steel replacement sprocket engineered for 420 chain systems with 48mm adjacent and 68mm opposite mounting hole centers, supplied with mounting screws for straightforward installation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your ATV uses a 420 chain and you need a reliable replacement sprocket, this RUTU 37-tooth rear sprocket is built to restore drivetrain performance without aftermarket guessing. Designed with precise bolt spacing and hardened steel construction, it fits quads and youth ATVs that accept 420-size sprockets and helps extend chain life thanks to tooth-radius profiling and heat-treated durability. Read on to confirm fitment, understand performance changes by tooth count, and see the installation notes you need.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I confirm this sprocket will fit my ATV?\u003c\/h3\u003e\n\n\u003cp\u003eVerify compatibility by checking your current sprocket or chain link for \"420\" markings and measuring the mounting holes. This RUTU sprocket provides 68mm center-to-center spacing for holes opposite each other and 48mm for adjacent holes, matching common ATV patterns.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConfirm your chain is type 420—this sprocket works only with 420 chains.\u003c\/li\u003e\n  \u003cli\u003eMeasure opposite hole centers: 68mm; adjacent hole centers: 48mm.\u003c\/li\u003e\n  \u003cli\u003eCheck the number of teeth (37T) to anticipate gear ratio change.\u003c\/li\u003e\n  \u003cli\u003eInspect youth ATV chain sizes—many use 420 or 428; choose accordingly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and treatments improve durability?\u003c\/h3\u003e\n\n\u003cp\u003eRUTU manufactures this sprocket from premium steel and applies heat treatment to harden the metal and resist wear. The process increases tensile strength and improves longevity under typical ATV loads, while a tooth-radius profile reduces chain friction.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003ePremium steel construction for corrosion resistance and toughness.\u003c\/li\u003e\n  \u003cli\u003eHigh-temperature heat treatment for improved hardness and wear life.\u003c\/li\u003e\n  \u003cli\u003eEngineered tooth radius to lower friction and reduce chain wear.\u003c\/li\u003e\n  \u003cli\u003eSupplied mounting screws matched to the sprocket for secure fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will changing to a 37-tooth rear sprocket affect performance?\u003c\/h3\u003e\n\n\u003cp\u003eAltering rear sprocket tooth count changes the bike’s final drive ratio: fewer teeth typically raise top speed but reduce low-speed torque, while more teeth increase torque for climbs at the cost of top speed. Choosing 37T balances acceleration and speed for many recreational ATV setups.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eReducing teeth increases top speed and reduces torque.\u003c\/li\u003e\n  \u003cli\u003eIncreasing teeth boosts torque and hill-climbing ability, but lowers top speed.\u003c\/li\u003e\n  \u003cli\u003e37T is a mid-range option suitable for mixed trail and open-area riding.\u003c\/li\u003e\n  \u003cli\u003eDo not change rear sprocket size without checking front sprocket effects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about installation and maintenance?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation uses the specified bolt spacing and the included mounting screws; ensure bolts are tightened to your ATV manufacturer's torque specs. Regular chain tension checks and lubrication extend both chain and sprocket life—inspect teeth for uneven wear or hook formation and replace when necessary.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse the included screws and tighten to the OEM torque recommendation.\u003c\/li\u003e\n  \u003cli\u003eConfirm 420 chain compatibility before fitting the sprocket.\u003c\/li\u003e\n  \u003cli\u003eMaintain correct chain tension and lubricate regularly.\u003c\/li\u003e\n  \u003cli\u003eInspect sprocket teeth periodically for wear; replace paired components together if worn.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for? Riders who own ATVs or youth quads that require a 420 chain-compatible rear sprocket with 37 teeth and specific 48mm\/68mm bolt spacing. It’s a practical replacement for weekend trail riders, small-farm utility riders, and parents servicing youth ATVs who want a hardened, pre-drilled steel sprocket supplied with mounting hardware. Avoid this model if your machine uses a chain size other than 420 or if your bolt pattern does not match the 48mm\/68mm spacing—measure before purchasing to ensure a correct, hassle-free fit.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this sprocket compatible with 428 chain?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This sprocket is designed for 420 chains only; 428 chains require a different sprocket pitch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does switching to 37T change in ride feel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Switching to 37T typically gives a balance of acceleration and top speed—less low-end torque than larger rear sprockets but higher potential top speed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RUTU","offers":[{"title":"Default Title","offer_id":67593267609785,"sku":"B0BNBSRFGK","price":60.86,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/rutu-atv-rear-sprocket-front-face.jpg?v=1790573857","url":"https:\/\/redleafauto.ca\/products\/rutu-atv-rear-sprocket-420-37t-48mm-68mm-bolt-spacing-heat-treated-steel-with-mounting-screws","provider":"Redleaf Auto","version":"1.0","type":"link"}