Sometimes hubs get stuck and the wheel doesn’t rotate properly. This article will explain how to fix this problem on a 135mm solid axle hub, with solutions for either Enviolo Automatic (AutomatiQ) or manual systems.

Backward compatibility

This guide is compatible with legacy 135mm solid axle hubs (Commercial/CO, Sportive/SP, Cargo/CA, N360, N380, N380SE).

Problem

Upon inspection, you detect one of the following:

• The hub or wheel is blocked, and does not spin or rotate properly.
• The CVP seems to be locked in mid-range or the ratio range seems to be limited.
• The hub seems locked up at either full overdrive (high ratio) or full underdrive (low ratio).

Solution

Check where the hub is stuck. For a hub locked in mid-range:

• If the hub is within 2 years of age, return the hub using the warranty request form. Enviolo hubs are closed containers and need to be sent back for closer inspection.

For a hub locked in full overdrive or full underdrive.

• You will need to unblock the hub with the help of combination pliers. The procedure depends on the transmission system you have - Automatic or Manual. Follow the steps below depending on which system you have:

Step-by-step instructions

Fix the hub – locked in full overdrive or full underdrive – according to system:

Enviolo Automatic

1. Disassemble the wheel from the bike frame.
2. Disassemble the Enviolo Automatic hub interface from the wheel.
3. Unblock the hub using combination pliers.
   • Scroll down for details
4. Reassemble the Automatic hub interface on the 135mm wheel.
   • Detailed instructions
5. Reassemble the Automatic-equipped wheel on the 135mm bike frame.
   • Detailed instructions
6. Update the Enviolo Automatic to latest firmware
   • Detailed instructions
7. Calibrate using the Enviolo Automatic
   • Detailed instructions

Manual

1. Disassemble the wheel from the bike frame.
2. Disassemble the Enviolo manual hub interface from the wheel.
3. Unblock using combination pliers.
   • Scroll down for details
4. Reset the 135mm hub to full overdrive.
   • Detailed instructions
5. Reassemble the Manual hub interface on the 135mm wheel.
   • Detailed instructions
6. Reassemble the Manual-equipped wheel on the 135mm bike frame.
   • Detailed instructions

If you successfully follow the steps above, then the hub should be unblocked and the bicycle should be riding smoothly again.

Using pliers to unblock the hub

Video

Tools

• Combination pliers
• Vice

Instructions

1. Mount the wheel with the left-side axle flats on a vice.
2. Use combination pliers to hold the shift driver.
   • The shift driver part is the spline nut closest to the hub (see photo below).
   • Be very careful not to damage the shift driver.
3. Spin the wheel clockwise.
4. At the same time as the wheel is spinning, carefully rotate the shift driver using the combination pliers:
   • Stuck in high gear - rotate the shift driver clockwise.
   • Stuck in low gear - rotate the shift driver counter-clockwise.

Be careful when unblocking the hub

While using the pliers, be careful not to damage the shift driver. Otherwise, it will be impossible to mount the hub interface later. The shift driver is one of the two splined nuts, the one that is closest to the hub.

If the problem persists (manual shifting)

If the problem persists and you have a manual hub interface (MHI), then the problem might be in the handlebar shifter, cabling, or the manual hub interface itself instead of the hub. In that case, we recommend following this guide: How to optimize shifting on a manual system