{"product_id":"fc-r8100","title":"FC-R8100 (ULTEGRA)","description":"\u003ch3 class=\"list_anchor_cs_h3\"\u003eSHIMANO FC-R8100 (ULTEGRA) | 12-speed Crankset with Enhanced Lightness, Stiffness, and Shifting Performance\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eConvert your pedaling force into reliable propulsion.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"FC-R8100\" from the SHIMANO ULTEGRA R8100 series is a crankset compatible with 2x12-speed road components.\u003c\/p\u003e\n\u003cp\u003eBy combining HOLLOWTECH II crank arms and HOLLOWGLIDE chainrings, it achieves a high level of both lightness and stiffness. This design efficiently transfers the rider's power to the road while providing a smooth pedaling feel.\u003c\/p\u003e\n\u003cp\u003eThe hollow-structure HOLLOWGLIDE chainring achieves weight reduction while maintaining high rigidity, and also improves front shifting performance. This enables quick and accurate shifting even during acceleration or climbing.\u003c\/p\u003e\n\u003cp\u003eThis is a core ULTEGRA component that offers high performance inherited from DURA-ACE, making it suitable for a wide range of uses, from racing to long rides and hill climbs.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"list_anchor_cs_h3\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eULTEGRA R8100 series 2x12-speed compatible crankset\u003c\/li\u003e\n\n\u003cli\u003eFeatures HOLLOWTECH II crank arms\u003c\/li\u003e\n\n\u003cli\u003eLightweight yet stiff design for excellent power transfer\u003c\/li\u003e\n\n\u003cli\u003eHigh shifting performance due to HOLLOWGLIDE chainrings\u003c\/li\u003e\n\n\u003cli\u003eOptimized stiffness, strength, weight, and rotational performance\u003c\/li\u003e\n\n\u003cli\u003eStable pedaling performance even during sprints and out-of-saddle efforts\u003c\/li\u003e\n\n\u003cli\u003eThree chainring configurations available to suit different uses\u003c\/li\u003e\n\n\u003cli\u003eExtensive lineup of crank arm lengths from 160 to 175mm\u003c\/li\u003e\n\n\u003cli\u003eSuitable for a wide range of uses, from racing to long rides\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"list_anchor_cs_h3\"\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eBrand: SHIMANO\u003c\/li\u003e\n\n\u003cli\u003eModel: FC-R8100\u003c\/li\u003e\n\n\u003cli\u003eSeries: ULTEGRA R8100\u003c\/li\u003e\n\n\u003cli\u003eCompatible speeds: 2x12 speed\u003c\/li\u003e\n\n\u003cli\u003eCompatible chain: HG 12-speed\u003c\/li\u003e\n\n\u003cli\u003eChainline: 44.5mm\u003c\/li\u003e\n\n\u003cli\u003eP.C.D.: 110mm\u003c\/li\u003e\n\n\u003cli\u003eSpider: 4-arm\u003c\/li\u003e\n\n\u003cli\u003eChainring configuration: 46-36T \/ 50-34T \/ 52-36T\u003c\/li\u003e\n\n\u003cli\u003eCrank arm length: 160 \/ 165 \/ 170 \/ 172.5 \/ 175mm\u003c\/li\u003e\n\n\u003cli\u003eQ-factor: 148mm\u003c\/li\u003e\n\n\u003cli\u003eCrank structure: HOLLOWTECH II\u003c\/li\u003e\n\n\u003cli\u003eChainring structure: HOLLOWGLIDE\u003c\/li\u003e\n\n\u003cli\u003eRecommended BB (threaded): SM-BBR60\u003c\/li\u003e\n\n\u003cli\u003eRecommended BB (press-fit): SM-BB72-41B\u003c\/li\u003e\n\n\u003cli\u003eBB shell width: 68 \/ 70mm\u003c\/li\u003e\n\n\u003cli\u003eAverage weight: 702g (46-36T) \/ 700g (50-34T) \/ 711g (52-36T)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe FC-R8100 is a crankset that truly embodies the high level of refinement expected from ULTEGRA.\u003c\/p\u003e\n\u003cp\u003eYou can feel the power you put in being directly converted into forward motion. It's responsive during sprints and climbs, giving the bike a more integrated and taut feel. The balance between lightness and stiffness is exceptionally good.\u003c\/p\u003e\n\u003cp\u003eFront shifting is also smooth, providing a sense of security especially when shifting under high load. Its performance is close to DURA-ACE, while offering an excellent balance with cost, which is another attractive point.\u003c\/p\u003e\n\u003cp\u003eThis is a classic crankset recommended not only for race-oriented riders but also for those who want to comfortably enjoy long rides and hill climbs.\u003c\/p\u003e","brand":"SHIMANO","offers":[{"title":"160mm \/ 46-36T \/ In-store stock","offer_id":50119115440403,"sku":"4550170852535","price":41258.0,"currency_code":"JPY","in_stock":false},{"title":"160mm \/ 46-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119115931923,"sku":"oty-4550170852535","price":41258.0,"currency_code":"JPY","in_stock":true},{"title":"160mm \/ 50-34T \/ In-store stock","offer_id":50119115473171,"sku":"4550170893743","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"160mm \/ 50-34T \/ Manufacturer order (approx. 10 days)","offer_id":50119115964691,"sku":"oty-4550170893743","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"160mm \/ 52-36T \/ In-store stock","offer_id":50119115505939,"sku":"4550170893934","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"160mm \/ 52-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119115997459,"sku":"oty-4550170893934","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"165 mm \/ 46-36T \/ In-store stock","offer_id":50119115538707,"sku":"4550170852429","price":41258.0,"currency_code":"JPY","in_stock":false},{"title":"165 mm \/ 46-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116030227,"sku":"oty-4550170852429","price":41258.0,"currency_code":"JPY","in_stock":true},{"title":"165 mm \/ 50-34T \/ In-store stock","offer_id":50119115571475,"sku":"4550170893996","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"165 mm \/ 50-34T \/ Manufacturer order (approx. 10 days)","offer_id":50119116062995,"sku":"oty-4550170893996","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"165 mm \/ 52-36T \/ In-store stock","offer_id":50119115604243,"sku":"4550170893781","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"165 mm \/ 52-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116095763,"sku":"oty-4550170893781","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"170mm \/ 46-36T \/ In-store stock","offer_id":50119115637011,"sku":"4550170852474","price":41258.0,"currency_code":"JPY","in_stock":false},{"title":"170mm \/ 46-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116128531,"sku":"oty-4550170852474","price":41258.0,"currency_code":"JPY","in_stock":true},{"title":"170mm \/ 50-34T \/ In-store stock","offer_id":50119115669779,"sku":"4550170894108","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"170mm \/ 50-34T \/ Manufacturer order (approx. 10 days)","offer_id":50119116161299,"sku":"oty-4550170894108","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"170mm \/ 52-36T \/ In-store stock","offer_id":50119115702547,"sku":"4550170894092","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"170mm \/ 52-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116194067,"sku":"oty-4550170894092","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"172.5mm \/ 46-36T \/ In-store stock","offer_id":50119115735315,"sku":"4550170852498","price":41258.0,"currency_code":"JPY","in_stock":false},{"title":"172.5mm \/ 46-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116226835,"sku":"oty-4550170852498","price":41258.0,"currency_code":"JPY","in_stock":true},{"title":"172.5mm \/ 50-34T \/ In-store stock","offer_id":50119115768083,"sku":"4550170894085","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"172.5mm \/ 50-34T \/ Manufacturer order (approx. 10 days)","offer_id":50119116259603,"sku":"oty-4550170894085","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"172.5mm \/ 52-36T \/ In-store stock","offer_id":50119115800851,"sku":"4550170894054","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"172.5mm \/ 52-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116292371,"sku":"oty-4550170894054","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"175mm \/ 46-36T \/ In-store stock","offer_id":50119115833619,"sku":"4550170852450","price":41258.0,"currency_code":"JPY","in_stock":false},{"title":"175mm \/ 46-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116325139,"sku":"oty-4550170852450","price":41258.0,"currency_code":"JPY","in_stock":true},{"title":"175mm \/ 50-34T \/ In-store stock","offer_id":50119115866387,"sku":"4550170894009","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"175mm \/ 50-34T \/ Manufacturer order (approx. 10 days)","offer_id":50119116357907,"sku":"oty-4550170894009","price":39745.0,"currency_code":"JPY","in_stock":true},{"title":"175mm \/ 52-36T \/ In-store stock","offer_id":50119115899155,"sku":"4550170893729","price":39745.0,"currency_code":"JPY","in_stock":false},{"title":"175mm \/ 52-36T \/ Manufacturer order (approx. 10 days)","offer_id":50119116390675,"sku":"oty-4550170893729","price":39745.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/4237\/2883\/files\/1_2d245568-cf84-4d3c-8416-273607ad35c3.jpg?v=1732509011","url":"https:\/\/store-eirin-jp.com\/en\/products\/fc-r8100","provider":"京都の自転車屋 CYCLE SHOP eirin ＆ サイクルハテナ","version":"1.0","type":"link"}