This guide explains how to assemble the Manual hub interface on a wheel with a 148mm modular axle hub.

Backward compatibility

This guide is compatible with legacy enviolo and NuVinci 148mm modular axle hubs.

Video instructions

Manual hub interface options

There are 2 different hub interfaces, which fit the different axle types and spline nut teeth (A) depending on the hub:

• 40T (teeth) - Heavy Duty, Extreme (and legacy enviolo CA)
• 44T (teeth) - Urban, City, Trekking (and legacy enviolo CO, SP, CA)

Step-by-step instructions

Tools

• Torque wrench
• 17mm long socket
• Marker pen (white)

Assembly instructions

1. Make sure the Manual hub interface you have has the correct amount of spline nut teeth for your hub:
   • The Urban, City, and Trekking hubs are compatible with 44T.
   • The Heavy Duty and Extreme hubs are compatible with 40T.
2. Determine the position of the wheel on the frame:
   • Typical orientation is forward, parallel to the chainstay, or via the seat stay cable routing.
   • Contrary to a 135mm solid axle assembly, the angle of the Manual hub interface in relation to the hub is not important when assembling the MHI on 148mm modular hubs.
   • Cables should not bend too much.
3. Make sure the Manual hub interface is rotated counterclockwise, to full overdrive position (H).
4. Remove the anti-shift retainer if one is installed on the hub.
   • The anti-shift retainer comes typically installed on new hubs.
   • If an anti-shift retainer is not installed, then make sure that the markings between the spline nut (C) and the shift driver (D) are aligned. If the marking are not aligned, you will need to reset the hub to full overdrive before proceeding.
5. Seat the hub interface fully onto the axle, onto the shift driver and spline nut.
   • Remember that the spline nut (C) and shift driver (D) markings must also be aligned, and the Manual hub interface must be in full overdrive (H).
6. Thread the right-hand 17mm nut, serrations facing outward, onto the axle.
   • Tighten it to 8-10Nm.

Proceed to the next guide

If you followed the steps above, your Manual hub interface is now assembled on the hub. Next, proceed to assemble the rear wheel:

• How to assemble an AUTOMATiQ-equipped rear wheel on a 148mm modular axle frame