• Designed for Shimano 11 speed Dura Ace R9100, Ultegra R8000, 105 R7000
• Fits to stock pulley cage
• Narrow wide tooth profile for improved chain retention
• 12T upper cog / 14T Lower cog
• Aluminum cogs
• Full Ceramic bearings that spin for AGES!
• 2 year warranty*
• Dura Ace R9100, Ultegra R8000 & 105 R7000
Ball bearings are wear items, similar to the chain on your bicycle and do require some maintenance and a new seal kit from time to time. Please download the service manual from the links below for step by step instructions on how to keep your bearings running smoothly.
Kogel Bearings strives for best-in-industry product support. Our hybrid and full ceramic bearings are covered under our 1+1 year warranty, which guarantees that we will keep you on the road for two years, pending on annual bearing service. View more details on our Returns & Warranty page.