Credit: Mike Nguyen

ONYX Quad Lock Mount

The display remains fully visible whether you mount a Quad Lock on the handlebar or the stem. Handlebar mounting places it on the bars, while stem mounting refers to installing the Quad Lock directly into the large silver top cap screw located just below the display.

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Quad Lock Parts

Quad Lock Handlebar Mount

To centrally mount the Quad Lock handlebar kit, start by removing the four handlebar clamp screws. For proper alignment, cut the thick spacer in half and place it on the top half of the mount clamp. Then cut the thin spacer in half and use it on the bottom half. If needed, stack the remaining thin spacer on top alongside the thick one to fine-tune the fit.

This setup keeps your display fully visible while allowing the Quad Lock to rotate between horizontal and vertical orientations. Don’t forget to apply threadlocker to both the mount screws and the four handlebar riser screws, then torque them all down to 20Nm for a rock-solid install. Once mounted, your phone will sit perfectly centered on the bars, ready for action.

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Quad Lock Fork Stem Mount

You can drill out the original steering stem top nut cap with a 13mm bit to fit any steering stem phone mount. Pro tip: pop off the top nut with a 30mm socket before drilling, then reinstall it with threadlocker and torque it down to 40 Nm. Want to keep it clean? Just grab a steering stem nut without a cap instead-both options get the job done!

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Hollow Steering Stem Nut

Apply two drops of thread lock to the steering stem nut before tightening it to 40 Nm. Steering stem nut M25 X 30 X P1.0.

Tools You’ll Need

You’ve got a few slick options for mounting your Quad Lock: slap it in the center of your handlebar below the display, drill into the steering stem nut, or swap it out for a hollow one without a cover. It’s more of an intermediate-level mod, but nail it, and you’ll have a phone mount setup worth bragging about.

Check out the ONYX tools post and grab the gear you need from the list below!

  • 30mm Socket
  • 10mm Socket
  • 5mm Hex
  • 13mm Drill Bit
  • Threadlocker

Quad Lock Stem Mount Versions

The Pro version of the Quad Lock fork stem mount features a metal expansion nut with two tabs, whereas the non-Pro version is made of plastic, making its expansion nut tabs prone to breaking if overtightened or repeatedly removed. The bottom expansion nut expands to secure three locking grips inside the head tube.

  • Pro version (black) uses a metal expansion nut.
  • The regualr version (blue) uses a plastic expansion nut.

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Metal Expansion Nut

The metal expansion nut provides a stronger grip and increased durability.

Plastic Expansion Nut

The plastic version limits the mount’s long-term durability, as it can only be removed and reinstalled a few times before the plastic nut fails.