{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"9953b555971b","name":"HONDA CR / CRF 125 / 250 / 450 / 500 1984 - 2022 STEEL REAR SPROCKET 51 TOOTH","sku":"WF.RFE210.51","brand":"Supersprox","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":9,"price":{"amount":46.9,"formatted":"£46.90"},"summary":"Steel rear sprocket, 51 tooth. Made from high carbon steel with a core strength of 400MPa for durability. Machined for perfect flatness and roundness using laser cutters, CNC lathes, CNC mills, flattening rolls, surface grinders, and tooth cutters. Features a black surface finish with a trivalent chromium layer over a zinc carbonate barrier for corrosion protection. Suitable for ATV machines, street bikes, and off-road two-wheel bikes.","attributes":[],"image":"https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-cr-crf-125-250-450-500-1984-2018-steel-rear-sprocket-52-tooth-black-2635-p.png","images":["https://www.twsgb.co.uk/Graphics/Std_Product_Images/honda-cr-crf-125-250-450-500-1984-2018-steel-rear-sprocket-52-tooth-black-2635-p.png"],"description":"Steel rear sprocket, 51 tooth. Made from high carbon steel with a core strength of 400MPa for durability. Machined for perfect flatness and roundness using laser cutters, CNC lathes, CNC mills, flattening rolls, surface grinders, and tooth cutters. Features a black surface finish with a trivalent chromium layer over a zinc carbonate barrier for corrosion protection. Suitable for ATV machines, street bikes, and off-road two-wheel bikes.","descriptionMarkdown":"### Supersprox High Carbon Steel Rear Sprocket - 51 Tooth\n\nThe Supersprox Steel Rear Sprocket is engineered for riders who demand exceptional durability, longevity, and reliable performance. Designed to withstand the rigors of off-road and street use, this 51-tooth sprocket offers a robust alternative to alloy equivalents, ensuring your drivetrain remains efficient for thousands of miles.\n\nBy choosing a high-quality steel sprocket, you prevent the premature wear often caused by softer materials. This ensures your chain lasts longer and maintains consistent power delivery, making it the ideal choice for riders looking for value without compromising on technical quality.\n\n### Key Features and Engineering\n\n \n- High Carbon Steel Construction: Built with a core strength of 400MPa, these sprockets are designed to resist bending and deformation, even under the stress of high-horsepower engines.\n \n- Precision Machining: Every unit undergoes a rigorous manufacturing process, including laser cutting, CNC milling, and surface grinding, to ensure perfect flatness and roundness for optimal chain alignment.\n \n- Advanced Corrosion Resistance: The signature black finish is not paint. It features a zinc carbonate base layer for structural protection, topped with a Trivalent Chromium layer that bonds to the metal. This provides superior corrosion resistance that will not chip or wear away like standard paint.\n \n- Enhanced Drivetrain Longevity: Designed to outlast traditional alloy sprockets, this steel construction helps protect your chain from the accelerated wear associated with worn-out teeth.\n \n- Versatile Application: Perfect for off-road bikes, street machines, and ATVs where reliability and extended service life are the top priorities.\n\nInvest in the Supersprox Steel Rear Sprocket for a technical, high-performance solution that keeps your bike running smoother for longer. With its superior material composition and specialized protective coating, this sprocket is built to endure the toughest riding conditions.","weightGrams":null,"fitments":[],"collections":[],"links":{"page":"https://www.2brosparts.com/products/honda-cr-crf-125-250-450-500-1984-2022-steel-rear-sprocket-51-tooth","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/9953b555971b:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/9953b555971b: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."]}}