Перемикач швидкостей Ceramicspeed Ospw System Shimano Dura Ace R9100/ultegra R8000 11s

CeramicSpeed Ceramic Oversized Pulley Wheel Black for Shimano Dura Ace 9100 and Ultegra 8000. CeramicSpeed makes some of the strongest, most accurate and lightest rolling bearings on the market, they are all ceramic. Ceramic bearings also provide better utilization of the riders watts. Oversized Pulley wheels are as the name suggests pulley wheels... щеthat are larger than normal. This gives less movement in the chain, thus giving a lesser energy loss and ultimately a greater power transfer. Fits only Shimano Dura Ace 9100 and Ultegra 8000. Comes with a new rear derailleur arm so you can change the whole set. Made of aluminum and with ceramic bearings. 607 bearings. With a 13 tooth pulley wheel at the top and a 19 tooth pulley wheel at the bottom.