{"product_id":"shimano-fc-m590-36t-silver-middle-104bcd","title":"Shimano FC-M590 36T Black Middle 104BCD","description":"\u003cp\u003eThis 36-tooth middle chainring comes from Shimano's Deore FC-M590 series, a 9-speed triple crankset built around a 104mm bolt circle diameter and a 4-arm mounting pattern. Finished in black, it sits between the outer 48T and inner 26T rings on the original 48-36-26T setup, giving riders a direct replacement for worn factory rings on this popular Deore groupset.\u003c\/p\u003e\u003cp\u003eBeyond the FC-M590, this ring is cross-compatible with several other Shimano 9-speed triple cranksets sharing the same 104mm middle-ring bolt pattern, including Deore FC-M591, Alivio FC-M4060 and FC-T4060, and Acera FC-M391 and FC-T3010. It offers a practical service option for shops and home mechanics maintaining older 9-speed mountain and trekking drivetrains without sourcing a full crankset.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQuick Facts\u003c\/strong\u003e\u003c\/p\u003e\u003ctable style=\"width:100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color: #F2F2F2; text-align: left;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial Composition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBCD \/ Bolt Pattern\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e104 mm, 4-bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePosition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eMiddle ring (of 48-36-26T triple)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSpeed Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e9-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCross-Compatible With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eDeore FC-M591, Alivio FC-M4060 \/ FC-T4060, Acera FC-M391 \/ FC-T3010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":43771498561599,"sku":"210000000526","price":27.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0066\/2283\/8853\/files\/shimano-fc-m590-36t-black-middle-104bcd-parts-chainrings-1260226611.png?v=1790651367","url":"https:\/\/bici.cc\/products\/shimano-fc-m590-36t-silver-middle-104bcd","provider":"Bici","version":"1.0","type":"link"}