Superstar Components UK Made derailleur wheels have been specially developed for the 13T Shimano 12 Speed drive system. They are manufactured inhouse in our CNC facility in Lincoln-UK from high-strength Aerospace grade 7075 T651 aluminium alloy. The design of the wheels keeps your chain safely where it belongs, and also provides a crisp shifting behaviour. We know our customers ride in extreme conditions so we fit double sealed bearings which are replaceable in-case they wear. These are further hidden by a double labyrinth seal for extra durability.

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:

• Compatible with SHIMANO 11 eg CUES Speed rear derailleurs with 13/13T setup
• Compatible with SHIMANO 12 Speed rear derailleurs with 13/13T setup

Technical specifications:

Material: 7075 T651 Aluminium
Bearing :Ceramic Hybrid bearings 
Chain: 8/9/10/11/12-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.