This inner chainring can only be used with Shimano Ultegra FC-6700 10 speed double chainsets with a 53-39T or 52-39T set up.

If the correct inner chainring is unavailable you can also use the chainring from the following chainsets:

- Shimano Dura-Ace FC-7900
- Shimano 105 FC-5700

These are a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc.

Genuine Shimano replacement part.