Gates CDX 55-Tooth Chainring Pulley – 104 BCD 4-Hole – Black Aluminum – Center Track

If you're running a Gates Carbon Drive system on your bike, this is a top-tier component.

It's a genuine Gates CDX pulley, which is the chainring that drives the belt.

This one has 55 teeth and a 104mm bolt circle diameter (BCD), with a standard 4-hole mounting pattern.

It's made from lightweight, durable black aluminum and is designed for the Gates center track belt system.

It's made in Germany, so you know the quality is there.

This is a single chainring, compatible with a huge range of bike types, from city bikes to mountain bikes to e-bikes.

The model number is CT11554AA REV E.

A solid, precision-made upgrade or replacement.