{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"f429b6135c1f","name":"REAR SPROCKET STEEL LIGHT SIL, MX-89549-2 SILVER, SR441-49 JTR89549","sku":"SR441-49.S.FIR","brand":"Factory Image Racing","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":20,"price":{"amount":23.78,"formatted":"£23.78"},"summary":"REAR SPROCKET STEEL LIGHT SIL, MX-89549-2 SILVER, SR441-49 JTR89549. FIR Ultra-Light steel rear sprockets are manufactured from premium quality high carbon steel, offering superior durability and lasting 3-4 times longer than aluminum sprockets. These maximum strength sprockets are made with C45 steel high carbon steel at minimum weight. Each sprocket is heat-treated, hand-finished, and sandblasted to reduce surface tension for a satin-silk finish. Meets or exceeds the highest quality standards set by the motorcycle industry. Part No. SR441-49.S.FIR. Cross reference numbers: MX-89549-2, 47010051049. 49 Teeth. 428 chain size.","attributes":[{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"278278"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock77524_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock77524_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock77524_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock77524_3.jpg"],"description":"REAR SPROCKET STEEL LIGHT SIL, MX-89549-2 SILVER, SR441-49 JTR89549. FIR Ultra-Light steel rear sprockets are manufactured from premium quality high carbon steel, offering superior durability and lasting 3-4 times longer than aluminum sprockets. These maximum strength sprockets are made with C45 steel high carbon steel at minimum weight. Each sprocket is heat-treated, hand-finished, and sandblasted to reduce surface tension for a satin-silk finish. Meets or exceeds the highest quality standards set by the motorcycle industry. Part No. SR441-49.S.FIR. Cross reference numbers: MX-89549-2, 47010051049. 49 Teeth. 428 chain size.","descriptionMarkdown":"### Factory Image Racing Ultra-Light Steel Rear Sprocket - Silver (49 Teeth)\n\n**High-Performance Durability for Demanding Rides**\n\nThis Factory Image Racing (FIR) rear sprocket is engineered for riders who demand exceptional durability and performance. Constructed from premium quality high carbon steel, it offers superior longevity, designed to withstand the rigors of extreme riding conditions and last significantly longer than traditional aluminum sprockets.\n\n\t\n- Premium Carbon Steel Construction: Made from C45 high carbon steel for maximum strength and resilience.\n\t\n- Ultra-Light Design: Engineered for maximum strength at minimum weight, contributing to better motorcycle handling.\n\t\n- Precision Finishing: Each sprocket is meticulously heat-treated and finished by hand.\n\t\n- Sandblasted Satin Finish: Sandblasted to reduce surface tension, resulting in a smooth, silk-like finish that also minimizes debris adhesion.\n\t\n- Industry Standards: Meets or exceeds the highest quality compound modification standards set by the motorcycle industry.\n\t\n- Guaranteed Satisfaction: A high-quality replacement part backed by FIR's commitment to customer satisfaction.\n\t\n- Specific Chain Compatibility: Designed for use with 428 pitch chains.\n\n**Part Number:**","weightGrams":null,"fitments":[{"make":"GASGAS","model":"MC 85","cc":null,"notes":null,"years":"2021–2025"},{"make":"HUSQVARNA","model":"TC 85","cc":null,"notes":null,"years":"2014–2025"},{"make":"KTM","model":"105 SX","cc":null,"notes":null,"years":"2004–2011"},{"make":"KTM","model":"85 SX 17/14","cc":null,"notes":null,"years":"2003–2025"},{"make":"KTM","model":"85 SX 19/16","cc":null,"notes":null,"years":"2003–2025"},{"make":"KTM","model":"85 SX BW","cc":null,"notes":null,"years":"2004–2020"},{"make":"KTM","model":"85 SX SW","cc":null,"notes":null,"years":"2004–2020"}],"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-light-sil-mx-89549-2-silver-sr441-49-jtr89549","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/f429b6135c1f:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/f429b6135c1f: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."]}}