{"product_id":"shimano-ultegra-fc-8100-12-speed-crankset-160-mm-double-12-speed-ckst2104-bicycle-crankset","title":"Shimano Ultegra FC-R8100 Hollowtech II 12-Speed Crankset 52\/36t","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eThe Shimano Ultegra FC-R8100 crankset is designed for 12-speed road bikes, featuring a 160mm crank length and a 52\/36 tooth double chainring setup. It uses Shimano's Hollowtech II spindle interface and has a 9\/16\" pedal spindle. The crankset offers a 44.5mm chainline and a 148mm Q-factor, compatible with 130mm hubs. Its Hollowglide structure balances stiffness, strength, weight, and rotational performance to enhance power transfer and front shifting precision. The crankset is black in color and does not include a bottom bracket. It uses a 110 Shimano asymmetric chainring BCD.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eDesigned for 12-speed road drivetrains with double 52\/36t chainrings for efficient front shifting. \u003c\/li\u003e\n\u003cli\u003eFeatures Shimano Hollowtech II spindle interface for secure and reliable crank attachment. \u003c\/li\u003e\n\u003cli\u003eConstructed with Hollowglide structure for balanced stiffness, strength, and reduced weight. \u003c\/li\u003e\n\u003cli\u003eOffered in a 160mm crank length to fit smaller riders, triathletes, and specific biomechanic needs. \u003c\/li\u003e\n\u003cli\u003eCompatible with 130mm hub spacing and 110 Shimano Asymmetric BCD chainring bolt circle diameter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":42205668147267,"sku":"CKST2104","price":365.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/CK0647_60990951-7340-4604-9af7-7944807325d7.jpg?v=1773386732","url":"https:\/\/tecopecosafe.com\/products\/shimano-ultegra-fc-8100-12-speed-crankset-160-mm-double-12-speed-ckst2104-bicycle-crankset","provider":"365 Cycles","version":"1.0","type":"link"}