{"product_id":"aluminum-bottom-bracket-socket-fsa-megaevo","title":"Aluminum Bottom Bracket Socket FSA MegaEvo","description":"\u003cp\u003eFSA's MegaEvo is the company's external bottom bracket cup that sits in the 16-notch HT2-compatible family. A 24 mm Shimano-pattern spindle, an outer engagement that follows the broader 16-notch standard, and Cinch-system cranks that thread into it.\u003c\/p\u003e\n\u003cp\u003eThe 1671 Aluminum BB Socket cut for FSA MegaEvo is sized specifically to the MegaEvo cup's outer profile. The splines mesh across the engagement; the aluminum body matches the cup's hardness so there's no metallic scarring after multiple service cycles. For shops that mainly see Shimano-equipped builds, the BBR60 or 16-notch generic socket covers most jobs; the FSA-specific socket is the right call when a workshop services FSA-equipped frames regularly enough that the cup's specific fit matters.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFSA MegaEvo external bottom brackets (24 mm spindle, Shimano-compatible)\u003c\/li\u003e\n\u003cli\u003eFSA Cinch-system BBs where the outer cup follows the MegaEvo notch profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e 30 mm-spindle FSA cups; those use a different socket pattern in the line\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive:\u003c\/strong\u003e 1\/2\" square drive (use with a torque wrench, ratchet, or fixed handle such as the Pro Socket Handle)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC-machined aluminum, red-anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNotch fit:\u003c\/strong\u003e FSA MegaEvo outer profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e the socket itself; pair with the \u003ca href=\"\/products\/bottom-bracket-socket-retaining-tool\"\u003eBottom Bracket Socket Retaining Tool\u003c\/a\u003e when servicing low-profile cups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuilt in Zreče\u003c\/h2\u003e\n\u003cp\u003eUnior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. The MegaEvo socket exists because FSA's cup geometry differs from Shimano's by enough to round a generic wrench's notches over a few service cycles; a cut sized to FSA's specific profile is what keeps both the socket and the cup serviceable past the first install.\u003c\/p\u003e\n\u003ch2\u003ePro tip from our mechanics\u003c\/h2\u003e\n\u003cp\u003eFSA cups thread the same direction as Shimano-pattern BSA: drive-side reverse-threaded, non-drive normally threaded. The direction sticks for most mechanics; what catches people out on FSA is the install torque. FSA publishes a tighter band than Shimano's 35–50 Nm range on current MegaEvo cups, so verify the current FSA service documentation before applying torque, especially on carbon shells where the frame manufacturer may specify a value lower than FSA's recommendation.\u003c\/p\u003e\n\u003cp\u003eFor the BB install procedure and thread-direction reference: \u003ca href=\"\/blogs\/tech-tips\/replace-or-clean-your-hollowtech-ii-bottom-bracket\"\u003eReplace or clean your bottom bracket →\u003c\/a\u003e.\u003c\/p\u003e","brand":"Unior","offers":[{"title":"Mega Evo","offer_id":44140854476844,"sku":"627622","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/5786\/5260\/files\/1671.MEvo_627622_image_1024.jpg?v=1747302517","url":"https:\/\/uniorusa.com\/products\/aluminum-bottom-bracket-socket-fsa-megaevo","provider":"Unior USA","version":"1.0","type":"link"}