In order to ensure the smoothest possible running over a longest period, we install standard size sealed deep groove ball bearings with the option of ceramic hybrid bearings for extra performance. We do not fit stainless steel bearings as they are softer than bearing steel and will fail much sooner than a bearing steel will rust. (if there is visable rust the bearing is contaminated and will die no matter what the material is!)
Pack Includes - 2x 13T jockeywheels with bearing shields
Standard bearings come with black shields, Ceramic bearing with red shields. if you want different colour then spares are available HERE
Compatible with SHIMANO 12 Speed rear derailleurs.
Material: 7075 T651 Aluminium
Bearing : Hard Chrome HiFill Bearings or Ceramic Hybrid bearings
Compatibility: SHIMANO 12 Speed
Number of teeth: 13 teeth top - 13T bottom
User Replaceable 688 2RS Bearings
Weight: 26 g (pair)
The wheels are suitable for SHIMANO 12 Speed rear derailleurs, which are 12-speed compatible.