{"product_id":"shimano-fc-r8100-ultegra-12-speed-double-chainset-cranks-with-hollowtech-ii-technology","title":"Shimano FC-R8100 Ultegra 12-Speed Double Chainset Cranks with HollowTech II Technology","description":"\u003cp\u003eThe Shimano FC-R8100 Ultegra 12-speed double chainset is engineered to deliver exceptional performance for road cyclists seeking a perfect blend of lightweight design and robust stiffness. Featuring HollowTech II technology, this crankset ensures maximum rigidity while maintaining a featherlight feel, making it an excellent choice for both competitive racers and passionate enthusiasts. The advanced HollowGlide hollow outer chainring greatly reduces flex, resulting in precise and reliable shifting even under intense pedaling loads.\u003c\/p\u003e\n\n\u003cp\u003eDesigned to work seamlessly with 12-speed HG chains, the chainring teeth optimize contact for improved power transfer and efficiency. The crankset also boasts a wide gear pitch spacing that enhances compatibility with frames featuring O.L.D. 135 \/ 142 mm, broadening its versatility. Additionally, a variety of chainring sizes and crank arm lengths are available, allowing riders to customize their setup to match their specific needs and racing style.\u003c\/p\u003e\n\n\u003cp\u003eShimano’s renowned HollowTech II integrated bottom bracket complements this chainset with wider bearing placement and a larger axle diameter, contributing to superior stiffness and smooth pedaling performance. Its seal design minimizes bearing interface friction, enhancing durability and ensuring long-lasting, consistent operation (sold separately).\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding an optimal balance of light weight and stiffness for enhanced cycling efficiency\u003c\/li\u003e\n  \u003cli\u003eDelivering precise shifting performance under high load thanks to HollowGlide outer chainring technology\u003c\/li\u003e\n  \u003cli\u003eImproving power transfer with chainring teeth designed for 12-speed HG chains\u003c\/li\u003e\n  \u003cli\u003eOffering compatibility with a wide range of frames due to increased gear pitch spacing\u003c\/li\u003e\n  \u003cli\u003eAllowing customization with multiple chainring and crank arm length options\u003c\/li\u003e\n  \u003cli\u003eEnsuring durability and smooth pedaling through the HollowTech II integrated bottom bracket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse with single-speed or non-12-speed transmission systems\u003c\/li\u003e\n  \u003cli\u003eFrames not compatible with O.L.D. 135 \/ 142 mm specifications\u003c\/li\u003e\n  \u003cli\u003eRiders seeking an ultra-heavy duty crankset for off-road or mountain biking\u003c\/li\u003e\n  \u003cli\u003eUsers requiring a bottom bracket included in the crankset package\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the bottom bracket included with this crankset?\u003c\/strong\u003e\u003cbr\u003eThe HollowTech II integrated bottom bracket is sold separately and must be purchased to complete the setup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this crankset with non-Shimano chains?\u003c\/strong\u003e\u003cbr\u003eThis crankset is optimized for Shimano 12-speed HG chains to maximize performance, so using other chains may result in less efficient shifting.\u003c\/p\u003e","brand":"Shimano Ultegra","offers":[{"title":"52-36t \/ Grey \/ 175mm","offer_id":45809475813551,"sku":"FCR8100E26","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"52-36t \/ Grey \/ 165mm","offer_id":45809475846319,"sku":"FCR8100A26","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"52-36t \/ Grey \/ 160mm","offer_id":45809475879087,"sku":"FCR8100M26","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"50-34t \/ Grey \/ 175mm","offer_id":45809475911855,"sku":"FCR8100E04","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"52-36t \/ Grey \/ 172.5mm","offer_id":45809475944623,"sku":"FCR8100D26","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"50-34t \/ Grey \/ 172.5mm","offer_id":45809475977391,"sku":"FCR8100D04","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"52-36t \/ Grey \/ 170mm","offer_id":45809476010159,"sku":"FCR8100C26","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"50-34t \/ Grey \/ 170mm","offer_id":45809476042927,"sku":"FCR8100C04","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"50-34t \/ Grey \/ 165mm","offer_id":45809476075695,"sku":"FCR8100M04","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"50-34t \/ Grey \/ 160mm","offer_id":45809476108463,"sku":"FCR8100A04","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"46-36t \/ Grey \/ 175mm","offer_id":45809476141231,"sku":"FCR8100E66","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"46-36t \/ Grey \/ 172.5mm","offer_id":45809476173999,"sku":"FCR8100D66","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"46-36t \/ Grey \/ 165mm","offer_id":45809476206767,"sku":"FCR8100A66","price":291.72,"currency_code":"GBP","in_stock":true},{"title":"46-36t \/ Grey \/ 170mm","offer_id":45809476239535,"sku":"FCR8100C66","price":291.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/fcr8100.jpg?v=1768530711","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/shimano-fc-r8100-ultegra-12-speed-double-chainset-cranks-with-hollowtech-ii-technology","provider":"Swinnerton Cycles","version":"1.0","type":"link"}