SRAM BlackBox AeroGlide ceramic bearing pulleys – a rear derailleur pulley set for road drivetrains.
Key features:
Bearings: Ceramic – lower friction and longer service life than standard pulleys.
Series: BlackBox – the SRAM line used by professional teams.
Application: Road rear derailleurs.
When to replace: Pulleys wear along with the chain – if the drivetrain has started to hum or feels draggy, this is the first thing to check.
Summary:
A small part most people forget until the drivetrain starts humming. Ceramic bearings spin more easily and stay smooth for longer.
FAQ
What is this product?
A rear derailleur pulley set with ceramic bearings.
What are its main advantages?
Lower drivetrain friction and longer bearing life.
Who is it best for?
Road riders replacing worn pulleys or chasing lower drivetrain drag.
How do I know when to replace them?
If the pulleys hum, feel rough when spun by finger, or show visible tooth wear.
What category does it belong to?
Bike parts – Derailleurs and shifters.
Which brand makes it?
SRAM.
