{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"5b5c3e36673f","name":"REAR SPROCKET BLACK ALLOY RENTHAL 50T, 2025 GASGAS/HUSQVARNA/KTM, ULTRALITE 518U-420-50GPBK","sku":"SR518-50.REN.BK","brand":"Renthal","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":6,"price":{"amount":47.81,"formatted":"£47.81"},"summary":"Renthal Ultralite 518U-420-50GPBK rear sprocket in black alloy. This sprocket features 50 teeth and is designed for optimal load dispersion and power transfer. It is CNC machined from high-strength 7075 T6 aluminium, offering a 66% weight reduction compared to steel alternatives. Engineered with tight tolerances for precise fitment and concentricity, this sprocket is built for extended durability with a hard-wearing surface treatment.","attributes":[{"label":"Variant Id","value":"346830"}],"image":null,"images":[],"description":"Renthal Ultralite 518U-420-50GPBK rear sprocket in black alloy. This sprocket features 50 teeth and is designed for optimal load dispersion and power transfer. It is CNC machined from high-strength 7075 T6 aluminium, offering a 66% weight reduction compared to steel alternatives. Engineered with tight tolerances for precise fitment and concentricity, this sprocket is built for extended durability with a hard-wearing surface treatment.","descriptionMarkdown":"### Renthal Ultralite 518U Series Rear Sprocket - 50 Tooth - Black\n\nEnhance your motorcycle's performance with the Renthal Ultralite 518U Series Rear Sprocket. Precision CNC machined in Manchester, UK, from high-strength 7075 T6 aluminium, this sprocket offers a significant weight reduction of 66% compared to traditional steel alternatives. Its design focuses on delivering optimal load dispersion and maximum power transfer, ensuring you get the most out of your engine.\n\n**Key Features:**\n\n \n- Manufactured from high-strength 7075 T6 aluminium for superior durability.\n \n- Weighs 66% less than equivalent steel sprockets, reducing unsprung mass.\n \n- CNC machined to extremely tight tolerances for accurate fitment and concentricity.\n \n- Optimised tooth profiling engineered for maximum power transfer.\n \n- Hard wearing surface treatment enhances longevity and performance.\n \n- Trusted by more factory race teams than any other aluminium sprocket brand.\n \n- Features 50 teeth for specific gearing applications.\n \n- Sleek black alloy finish for a premium look.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/rear-sprocket-black-alloy-renthal-50t-2025-gasgashusqvarnaktm-ultralite-518u-420","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/5b5c3e36673f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/5b5c3e36673f: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."]}}