{"product_id":"fsa-gossamer-pro-chainset-50-34t-172-5mm","title":"FSA  Gossamer Pro Chainset 30mm Axle 50-34t 172.5mm","description":"\u003cp\u003eThe \u003ca href=\"\/collections\/fsa\"\u003eFSA\u003c\/a\u003e Gossamer Pro Chainset is a high-performance road crankset built for riders who demand precision, reliability, and a weight-conscious design without compromising stiffness. Featuring a compact 50\/34T chainring configuration and a robust 30mm axle, this crankset delivers efficient power transfer whether you're grinding up long climbs or pushing hard on flat roads.\u003c\/p\u003e\n\n\u003cp\u003eConstructed from forged alloy, the Gossamer Pro sits firmly in FSA's performance-oriented Gossamer family — a range trusted by road cyclists worldwide for its blend of durability and ride quality. Available in multiple crank arm lengths to suit a wide range of rider geometries, it's a versatile upgrade for any road build. Pair it with a compatible \u003ca href=\"\/products\/fsa-t47-68mm-road-bottom-bracket-for-386evo-30mm-cranks-with-sealed-bearings\"\u003eFSA bottom bracket\u003c\/a\u003e for a seamless, fully matched drivetrain.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building up a new road bike or upgrading an existing drivetrain, the Gossamer Pro Chainset offers excellent value within the \u003ca href=\"\/collections\/fsa\"\u003eFSA Gossamer range\u003c\/a\u003e. Compatible with Shimano and FSA 2x drivetrains, it integrates cleanly into most modern road groupsets. Explore the full \u003ca href=\"\/products\/fsa-gossamer-pro-megaexo-24-dm-road-cranks-2x12-50x34t-170mm-shimano-fsa-compatible\"\u003eFSA Gossamer Pro MegaExo variant\u003c\/a\u003e or the \u003ca href=\"\/products\/fsa-gossamer-386evo-v23-2x12-road-alloy-chainset-compatible-with-sram-shimano-fsa\"\u003eGossamer 386Evo V23\u003c\/a\u003e if your frame requires a different bottom bracket standard.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It's Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoad cycling and endurance riding requiring efficient 2x compact gearing\u003c\/li\u003e\n\u003cli\u003eRiders seeking a stiff, reliable crankset upgrade without going full groupset\u003c\/li\u003e\n\u003cli\u003eBuilds using Shimano or FSA-compatible 2x drivetrains\u003c\/li\u003e\n\u003cli\u003eCyclists who want multiple crank arm length options to dial in their fit\u003c\/li\u003e\n\u003cli\u003ePairing with FSA 30mm bottom brackets for a fully matched drivetrain\u003c\/li\u003e\n\u003cli\u003eReplacing worn or damaged cranks on existing road bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It's NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x drivetrain setups — this is a 2x chainring configuration\u003c\/li\u003e\n\u003cli\u003eMountain bike or gravel-specific builds requiring wider Q-factor cranks\u003c\/li\u003e\n\u003cli\u003eFrames with BB30 or PF30 bottom bracket shells without an adapter\u003c\/li\u003e\n\u003cli\u003eSRAM AXS or electronic groupsets requiring proprietary spider interfaces\u003c\/li\u003e\n\u003cli\u003eRiders needing a triple chainring setup for touring or heavy load cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat bottom bracket do I need for the FSA Gossamer Pro 30mm Axle Chainset?\u003c\/strong\u003e\u003cbr\u003eYou'll need a bottom bracket compatible with a 30mm axle diameter. FSA offer several options depending on your frame's shell standard — including \u003ca href=\"\/products\/fsa-t47-68mm-road-bottom-bracket-for-386evo-30mm-cranks-with-sealed-bearings\"\u003eT47 68mm\u003c\/a\u003e, \u003ca href=\"\/products\/fsa-t47-85-5mm-road-bottom-bracket-for-30mm-386evo-cranks-t47-frame\"\u003eT47 85.5mm\u003c\/a\u003e, and \u003ca href=\"\/products\/fsa-t47-76-75mm-road-bottom-bracket-for-30mm-386evo-cranks-threaded-frame\"\u003eT47 76.75mm\u003c\/a\u003e variants. Check your frame's bottom bracket shell type before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the FSA Gossamer Pro compatible with Shimano groupsets?\u003c\/strong\u003e\u003cbr\u003eYes — the Gossamer Pro Chainset is compatible with Shimano 2x road drivetrains. It uses a standard 4-bolt 110mm BCD spider, making it suitable for use with most Shimano-compatible front derailleurs and chains.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I replace just the chainrings on the Gossamer Pro?\u003c\/strong\u003e\u003cbr\u003eYes. FSA offer replacement chainrings and \u003ca href=\"\/products\/fsa-chainring-bolt-kit-for-gossamer-pro-2x-ml138-ml163-crankset-replacement\"\u003echainring bolt kits\u003c\/a\u003e for the Gossamer Pro, making it easy to swap rings if they wear out without replacing the entire crankset.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich crank arm length should I choose?\u003c\/strong\u003e\u003cbr\u003eCrank arm length is typically determined by your inseam length and riding style. Most road cyclists use lengths between 170mm and 175mm. If you're unsure, a bike fit session is the best way to determine the ideal length for your anatomy and goals.\u003c\/p\u003e","brand":"FSA","offers":[{"title":"Default Title","offer_id":47138752200879,"sku":"336-0027554010","price":159.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/20260703_131956.avif?v=1783081505","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/fsa-gossamer-pro-chainset-50-34t-172-5mm","provider":"Swinnerton Cycles","version":"1.0","type":"link"}