Chainring Adapter (Shimano 4-Bolt to 144BCD)

An adapter to fit 144BCD track chainrings onto a Shimano Dura Ace R9100 110BCD 4 bolt cranks.

The adapter was developed in conjunction with a Paralympic cyclist to enable him to run a standard track chainring while also an inner 11 speed chainring to connect to the pilots crankset.

The adapter can be run in tandem configuration or just as standard.

The ideal chain line for a track bike is 42mm /- 2mm

Visit our blog post on how to adjust your chainline for greatest drive chain efficiencies.

Specifications:

- Compatible with R9100 Dura-ace cranksets

Stiff and lightweight 7075-T6 Aluminium

Chainline re-configured to 42mm

Black hard anodised finish

Chainring and chainring bolts not included