{"product_id":"ceramicspeed-oversized-ceramic-pulley-wheel-system-limited-gold-shimano-dura-ace-9100","title":"CeramicSpeed Oversized Ceramic Pulley Wheel System - Limited Gold - Shimano Dura-Ace 9100","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eCeramicSpeed Oversized Ceramic Pulley Wheel System - Limited Gold - Shimano Dura-Ace 9100\u003c\/strong\u003e is CeramicSpeed's original OSPW design in a limited gold finish, built for Shimano's 9100-series Dura-Ace and Ultegra 8000 groupsets. It replaces the stock pulley cage with 13-tooth and 19-tooth aluminum pulley wheels — larger than Shimano's stock pulleys, which reduces how sharply the chain has to bend as it travels through the derailleur and cuts down on friction at the source.\u003c\/p\u003e\n\n\u003cp\u003eEach pulley runs on CeramicSpeed's coated ceramic bearings, with hardened stainless steel races and a metallic coating that CeramicSpeed states makes the bearing rings 75% harder than standard steel. The cage is carbon fiber reinforced polyamide, chosen for a stiff, lightweight structure that holds the pulleys in precise alignment. All told the system weighs around 77 grams. CeramicSpeed's own testing puts the friction reduction at 30-60% over a stock Shimano pulley setup, translating to a claimed savings of roughly 2.4 watts — a manufacturer figure from their lab testing rather than an independently verified number, though the combination of larger pulleys and ceramic bearings is a well-established way to reduce drivetrain drag.\u003c\/p\u003e\n\n\u003cp\u003eThis is a component built for Shimano's previous-generation 11-speed Dura-Ace and Ultegra Di2 or mechanical groupsets, not the current 12-speed 9200\/9250 lineup, so it's worth confirming which generation your bike runs before ordering. At $449.25, marked down from $599, it's a way to get CeramicSpeed's coated bearing technology and a distinctive gold finish at a discount on an older but still widely-ridden groupset generation. It's backed by CeramicSpeed's lifetime warranty on coated products.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"CeramicSpeed","offers":[{"title":"Gold","offer_id":43509652684844,"sku":"106201","price":449.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/ceramicspeed-oversized-ceramic-pulley-wheel-system-limited-gold-shimano-dura-ace-9100-4622860.jpg?v=1771301707","url":"https:\/\/ricycles.com\/products\/ceramicspeed-oversized-ceramic-pulley-wheel-system-limited-gold-shimano-dura-ace-9100","provider":"RA Cycles","version":"1.0","type":"link"}