{"product_id":"ceramicspeed-oversized-pulley-wheel-system-shimano-dura-ace-9250-ultegra-8150","title":"CeramicSpeed Oversized Pulley Wheel System - Shimano Dura-Ace 9200\/Ultegra 8100","description":"\u003cdiv\u003e\n  \u003cp\u003eThe \u003cstrong\u003eCeramicSpeed Oversized Pulley Wheel System - Shimano Dura-Ace 9200\/Ultegra 8100\u003c\/strong\u003e replaces your rear derailleur's stock pulley cage with a larger 13-tooth upper and 19-tooth lower pulley wheel setup, built specifically for Shimano's Dura-Ace 9200 and Ultegra 8100 rear derailleurs. The larger pulleys reduce the angle the chain wraps through at each pulley, which cuts friction and drivetrain drag compared to the smaller pulleys Shimano ships stock. This is the standard version of the system, running CeramicSpeed's low-friction bearings without the coated bearing upgrade.\u003c\/p\u003e\n\n  \u003cp\u003eCeramicSpeed reports overall power savings of 30-60% over a stock pulley setup, and in some cases more, largely from reduced chain articulation and lower friction in the bearings and seals. The oversized tooth profile also extends pulley wheel life to roughly 3-5 times that of a standard OE pulley, since the larger diameter spreads chain wear across more contact points over the life of the part. The cage itself is built from carbon fiber, keeping weight low while protecting the pulley wheels from impact.\u003c\/p\u003e\n\n  \u003cp\u003eEvery system ships with a 15ml dropper bottle of CeramicSpeed's own bearing oil, so you can maintain the bearings' low-friction performance without guessing at compatible lubricants. It's a straightforward bolt-on upgrade for Dura-Ace 9200 or Ultegra 8100 riders who want a real efficiency gain without stepping up to CeramicSpeed's coated bearing or newer RS cage options.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"CeramicSpeed","offers":[{"title":"Blue","offer_id":43509737095212,"sku":"110273","price":449.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/ceramicspeed-oversized-pulley-wheel-system-shimano-dura-ace-9250ultegra-8150-5578945.jpg?v=1771301707","url":"https:\/\/ricycles.com\/products\/ceramicspeed-oversized-pulley-wheel-system-shimano-dura-ace-9250-ultegra-8150","provider":"RA Cycles","version":"1.0","type":"link"}