{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"4defeebf26ac","name":"REAR SPROCKET STEEL 45 [JTR301/210.45] 520, DOUBLE DRILLED JTR301, JTR210","sku":"SR301-45.S.DR","brand":"Dirt Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":15,"price":{"amount":14.9,"formatted":"£14.90"},"summary":"Rear Drive Sprocket SR301-45.S.DR is a 45-tooth steel sprocket for 520 chain systems. It is made with C45 high-carbon steel, heat-treated, and sandblasted. Features dual bolt patterns including Countersunk 8.5 mm and Plain 10.5 mm. Available in powder-coated black or bright zinc plating (silver BZP). Meets or exceeds motorcycle industry compound standards and is a direct OEM replacement. Specifications: Tooth Count 45, Chain Size 520, Mounting Dual fitment (CSK 8.5 mm and CTB 10.5 mm). Part No. SR301-45.S.DR. Cross-Reference OEM Part Numbers: JTR301.45, JTR210.45, L17-0245, MX-80345.","attributes":[{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"278177"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR301-45_2ES_2EDR/fc877e9b2c5804d8.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR301-45_2ES_2EDR/fc877e9b2c5804d8.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR301-45_2ES_2EDR/e4670be4e10b403e.jpg"],"description":"Rear Drive Sprocket SR301-45.S.DR is a 45-tooth steel sprocket for 520 chain systems. It is made with C45 high-carbon steel, heat-treated, and sandblasted. Features dual bolt patterns including Countersunk 8.5 mm and Plain 10.5 mm. Available in powder-coated black or bright zinc plating (silver BZP). Meets or exceeds motorcycle industry compound standards and is a direct OEM replacement. Specifications: Tooth Count 45, Chain Size 520, Mounting Dual fitment (CSK 8.5 mm and CTB 10.5 mm). Part No. SR301-45.S.DR. Cross-Reference OEM Part Numbers: JTR301.45, JTR210.45, L17-0245, MX-80345.","descriptionMarkdown":"### Dirt Racing Rear Drive Sprocket - 45 Tooth, 520 Chain, Double Drilled\n\nEnhance your motorcycle's drivetrain with this high-quality 45-tooth rear drive sprocket from Dirt Racing. Designed for 520 chain systems, this sprocket offers robust performance and durability for both off-road and road applications. It serves as a direct OEM replacement, ensuring a precise fit and reliable operation.\n\n#### Key Features:\n\n\t\n- Material: Constructed from C45 high-carbon steel for superior strength and longevity.\n\t\n- Heat Treatment & Finish: Undergoes heat treatment and sandblasting to reduce surface tension, followed by a durable finish in either powder-coated black or silver zinc plating for corrosion resistance.\n\t\n- Dual Mounting Options: Features two bolt hole patterns to accommodate various setups: Countersunk (CSK) 8.5 mm and Plain (CTB) 10.5 mm.\n\t\n- Chain Compatibility: Specifically designed for 520 pitch chains.\n\t\n- Tooth Count: 45 teeth for optimized gear ratio.\n\t\n- Industry Standards: Meets or exceeds motorcycle industry compound standards for performance and safety.\n\n#### Specifications:\n\n\t\n- Tooth Count: 45\n\t\n- Chain Size: 520\n\t\n- Mounting: Dual fitment (CSK 8.5 mm and CTB 10.5 mm)\n\t\n- Part Number: \n\n#### Cross-Reference Numbers:\n\n\t\n- JTR301.45\n\t\n- JTR210.45\n\t\n- L17-0245\n\t\n- MX-80345","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-45-jtr30121045-520-double-drilled-jtr301-jtr210","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/4defeebf26ac:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/4defeebf26ac: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."]}}