Kogel 12/14 Tooth Full Ceramic Oversized Pulley Wheels for Shimano | Sigma Sports
Kogel's Kolossos Oversized Cage Claims to Save you 2.5 Watts for $399 - Pinkbike
Kogel Bearings - Question: Why don't your oversized pulleys come with an oversized derailleur cage? Answer: We will bring performance benefits as long as they do not stand in the way of
We test and compare oversized derailleur cages from Kogel and CeramicSpeed
Kogel's Kolossos Oversized Cage Claims to Save you 2.5 Watts for $399 - Pinkbike