{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"65677360cc4f","name":"REAR SPROCKET STEEL 51 [JTR301/210.51] 520, DOUBLE DRILLED JTR301, JTR210","sku":"SR301-51.S.DR","brand":"Dirt Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":19,"price":{"amount":19.8,"formatted":"£19.80"},"summary":"The REAR SPROCKET STEEL 51 [JTR301/210.51] 520, DOUBLE DRILLED JTR301, JTR210 is a 51-tooth steel sprocket designed for motorcycles using 520 chain systems. It is made with C45 high-carbon steel, heat-treated and sandblasted to reduce surface tension. The dual-hole design features countersunk CSK 8.5 mm and CTB Plain 10.5 mm mounting holes. Available in powder-coated black or bright zinc plated silver. Part No.: SR301-51.S.DR. Cross-Reference OEM Part Numbers: JTR301.51, JTR210.51, MX-80351.","attributes":[{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"278206"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock77452_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock77452_1.jpg"],"description":"The REAR SPROCKET STEEL 51 [JTR301/210.51] 520, DOUBLE DRILLED JTR301, JTR210 is a 51-tooth steel sprocket designed for motorcycles using 520 chain systems. It is made with C45 high-carbon steel, heat-treated and sandblasted to reduce surface tension. The dual-hole design features countersunk CSK 8.5 mm and CTB Plain 10.5 mm mounting holes. Available in powder-coated black or bright zinc plated silver. Part No.: SR301-51.S.DR. Cross-Reference OEM Part Numbers: JTR301.51, JTR210.51, MX-80351.","descriptionMarkdown":"### Dirt Racing Steel Rear Sprocket 51 Tooth for 520 Chain\n\nUpgrade your motorcycle's drivetrain with this high-quality 51-tooth steel rear sprocket from Dirt Racing. Engineered for durability and performance, this sprocket is designed to work seamlessly with 520 pitch chains, providing reliable power transfer for both off-road adventures and street riding.\n\n**Key Features:**\n\n \n- Constructed from C45 high-carbon steel for superior strength and longevity.\n \n- Heat-treated and sandblasted to reduce surface tension, enhancing durability.\n \n- Features a double-drilled mounting design with both countersunk 8.5 mm (CSK) and plain 10.5 mm (CTB) holes for versatile fitment.\n \n- Available in a durable powder-coated black finish or a bright zinc-plated silver finish.\n \n- Precision engineered for optimal performance and a perfect fit.\n\n**Specifications:**\n\n \n- Tooth Count: 51\n \n- Chain Size Compatibility: 520\n \n- Material: C45 High-Carbon Steel\n \n- Mounting Hole Type: Countersunk 8.5 mm & Plain 10.5 mm\n\n**Cross-Reference Part Numbers:**\n\n \n- JTR301.51\n \n- JTR210.51\n \n- MX-80351","weightGrams":null,"fitments":[{"make":"HONDA","model":"CRF L 250","cc":null,"notes":null,"years":"2013–2016"},{"make":"HONDA","model":"XR 250","cc":null,"notes":null,"years":"1996–2004"},{"make":"HONDA","model":"XR 400","cc":null,"notes":null,"years":"1996–2005"}],"collections":[{"name":"Chain & Sprockets","url":"https://www.2brosparts.com/api/agent/collection/GB/chain-sprockets"},{"name":"Sprockets & Components (Rear)","url":"https://www.2brosparts.com/api/agent/collection/GB/sprockets-components-rear"}],"links":{"page":"https://www.2brosparts.com/products/rear-sprocket-steel-51-jtr30121051-520-double-drilled-jtr301-jtr210","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/65677360cc4f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/65677360cc4f:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}