{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"6dfcfb685145","name":"REAR SPROCKET STEEL 42 [JTR301/210.42] 520, DOUBLE DRILLED JTR301, JTR210","sku":"SR301-42.S.DR","brand":"Dirt Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":27,"price":{"amount":18.98,"formatted":"£18.98"},"summary":"The REAR SPROCKET STEEL 42 [JTR301/210.42] 520, DOUBLE DRILLED JTR301, JTR210 is a 42-tooth steel sprocket designed for 520 chain applications. It features dual mounting hole configurations (countersunk CSK 8.5 mm and plain CTB 10.5 mm) for broad compatibility. Constructed from C45 high-carbon steel, it is heat-treated and sandblasted for durability and stress resistance, and finished in either powder-coated black or bright zinc plating. Specifications include 42 teeth, 520 chain size, and dual fitment mounting (CSK 8.5 mm and CTB 10.5 mm). Part No. SR301-42.S.DR. Cross-reference OEM Part Numbers: JTR301.42, JTR210.42, L17-0242, MX-80342. Meets or exceeds motorcycle industry compound standards and is a direct OEM replacement. Manufacturer: Dirt Racing. Weight: 828g.","attributes":[{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"278165"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock77411_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock77411_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock77411_2.jpg"],"description":"The REAR SPROCKET STEEL 42 [JTR301/210.42] 520, DOUBLE DRILLED JTR301, JTR210 is a 42-tooth steel sprocket designed for 520 chain applications. It features dual mounting hole configurations (countersunk CSK 8.5 mm and plain CTB 10.5 mm) for broad compatibility. Constructed from C45 high-carbon steel, it is heat-treated and sandblasted for durability and stress resistance, and finished in either powder-coated black or bright zinc plating. Specifications include 42 teeth, 520 chain size, and dual fitment mounting (CSK 8.5 mm and CTB 10.5 mm). Part No. SR301-42.S.DR. Cross-reference OEM Part Numbers: JTR301.42, JTR210.42, L17-0242, MX-80342. Meets or exceeds motorcycle industry compound standards and is a direct OEM replacement. Manufacturer: Dirt Racing. Weight: 828g.","descriptionMarkdown":"### Dirt Racing Rear Drive Steel Sprocket 42 Tooth 520 Chain\n\nThis 42-tooth rear drive sprocket is designed for 520 chain applications, offering a direct OEM replacement for enhanced drivetrain performance. Manufactured from C45 high-carbon steel, it undergoes a rigorous heat-treatment and sandblasting process to enhance durability, resist wear, and reduce surface tension.\n\nKey Features:\n\n\t\n- Constructed from robust C45 high-carbon steel for superior strength.\n\t\n- Heat-treated and sandblasted to ensure longevity and stress resistance.\n\t\n- Features a versatile double drilled mounting pattern with both countersunk (8.5 mm) and plain (10.5 mm) bolt holes for broad compatibility.\n\t\n- Available in a durable powder-coated black or bright zinc plated silver finish.\n\t\n- Meets or exceeds motorcycle industry standards for compound performance.\n\nSpecifications:\n\n\t\n- Tooth Count: 42\n\t\n- Chain Size Compatibility: 520\n\t\n- Mounting Pattern: Dual fitment (Countersunk 8.5 mm & Plain 10.5 mm)\n\t\n- Material: High-carbon steel\n\t\n- Finish Options: Powder-coated black or Silver BZP\n\nThis sprocket is a reliable choice for riders seeking a high-quality, durable, and compatible rear sprocket for their motorcycle.","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-42-jtr30121042-520-double-drilled-jtr301-jtr210","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/6dfcfb685145:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/6dfcfb685145:1"}},"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."]}}