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 AUTOMATiQ (AHI) or Manual (MHI) hub interfaces.

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

For a hub locked in full overdrive or full underdrive:

Automatic shifting system

1. Disassemble the AutomatiQ-equipped wheel from the bike frame.
2. Disassemble the AutomatiQ hub interface from the wheel.
3. Unblock the hub using combination pliers.
   See detailed instructions below
4. Reassemble the AutomatiQ hub interface on the 135mm wheel.
   See detailed instructions
5. Reassemble the AutomatiQ-equipped wheel on the 135mm bike frame.
   See detailed instructions
6. Calibrate the AutomatiQ using the Enviolo app.
   See detailed instructions

Manual shifting system

1. Disassemble the Manual-equipped wheel from the bike frame.
2. Disassemble the Manual hub interface from the wheel.
3. Unblock using combination pliers.
   See detailed instructions below
4. Reset the 135mm hub to full overdrive.
   See detailed instructions
5. Reassemble the Manual hub interface on the 135mm wheel.
   See detailed instructions
6. Reassemble the Manual-equipped wheel on the 135mm bike frame.
   See detailed instructions

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 after following all the above steps, and you have a Manual hub interface (MHI), then the problem might be in the manual controller, cabling, or MHI hardware instead of the hub. In that case, we recommend following this guide:

• How to optimize or unblock shifting on a manual system

Done

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

For further assistance, contact support.