If, when pedaling, you hear a plastic click sound, see below what you can do.

Backward compatibility

This guide is compatible with the legacy 135mm solid axle hub Commercial/CO.

Problem

Upon inspection, you detect one of the following:

• You hear a click sound once per wheel rotation, coming from the hub’s rim brake adapter.
• The rim brake adapter cover of your 135mm solid axle hub (Urban, City, Trekking) is damaged, which may be causing the noise.

Solution

Follow these steps:

1. Check if the rim brake adapter cover is fitted correctly.
2. If the rim brake adapter is not fitted correctly, press the cover into place.
3. If the error persists, replace the cover.
   • Follow this guide for instructions - How to replace the brake adapter on 135mm hubs.
   • You can buy a replacement adapter in our online store, or other enviolo parts supplier.

Done

You should now have a noiseless wheel rotation.

For any questions, please contact support.