{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"3eaa9e31eda7","name":"REAR SPROCKET 39 [1857.39] 520, BLACK","sku":"SR603-39.STEEL","brand":"Dirt Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":10,"price":{"amount":17.35,"formatted":"£17.35"},"summary":"Rear steel sprocket with 39 teeth for 520 chain systems. Constructed from C45 high carbon steel, this sprocket is heat-treated, hand-finished, and sandblasted to reduce surface tension. Features a black powder-coated finish for enhanced surface integrity. Meets or exceeds motorcycle industry standards. Part Number: SR603-39.STEEL.","attributes":[{"label":"General Colour C","value":"Black"},{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"278666"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR603-39_2ESTEEL/a703f0349b77cd18.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR603-39_2ESTEEL/a703f0349b77cd18.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/SR603-39_2ESTEEL/9751cff844ae49f7.jpg"],"description":"Rear steel sprocket with 39 teeth for 520 chain systems. Constructed from C45 high carbon steel, this sprocket is heat-treated, hand-finished, and sandblasted to reduce surface tension. Features a black powder-coated finish for enhanced surface integrity. Meets or exceeds motorcycle industry standards. Part Number: SR603-39.STEEL.","descriptionMarkdown":"### Dirt Racing 39 Tooth Rear Sprocket for 520 Chain - Black\n\nThis high-quality rear steel sprocket from Dirt Racing features 39 teeth and is designed for use with 520 chain systems. Manufactured from robust C45 high carbon steel, it provides a durable and reliable solution for your motorcycle or ATV. The sprocket undergoes a rigorous heat-treatment process and is hand-finished to ensure consistent performance. A sandblasting treatment is applied to reduce surface tension, enhancing its longevity. The sprocket is finished with a durable black powder coating for improved surface integrity and a sleek appearance. This product is engineered to meet or exceed strict motorcycle industry standards for compound modification.\n\n**Key Features:**\n\n \n- Constructed from C45 high carbon steel for superior strength and durability.\n \n- Heat-treated and hand-finished for optimized and consistent performance.\n \n- Sandblasted surface treatment to minimize surface tension.\n \n- Features a protective black powder-coated finish.\n \n- Designed and manufactured to meet or exceed industry standards.\n\n**Specifications:**\n\n \n- Tooth Count: 39\n \n- Chain Size Compatibility: 520\n \n- Material: C45 high carbon steel\n \n- Finish: Black powder coat","weightGrams":null,"fitments":[],"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-39-185739-520-black","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/3eaa9e31eda7:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/3eaa9e31eda7:1"}},"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."]}}