The Nucleus Locker makes changing your CYC Photon chain rings easy!
Use it as a tool to remove the stubborn CYC nut. Add some colour and style to your ride.

Nucleus Locker for the CYC Photon motor.

Add a touch of Bling to your ride with a Nucleus Locker.

Designed to replace the difficult to remove chain ring nut on the CYC Photon motors, making it easier to replace chain rings and adding style to your ride.

The Nucleus Locker not only creates an easy to remove nut that can be loosened with a standard 16-notch bottom bracket tool, it also acts as a removal tool to loosen the often stubborn existing CYC Photon chain ring nut.

This stunning retaining nut comes with a set of engagement pins so you can use a standard 16-notch bottom bracket tool to remove the existing CYC nut. The Lekkie Sixteen-44 sockets are designed to fit and available here.

Get the perfect chain-line or complete the whole easy change SplineUp system with the other Lekkie SplineUp parts.

Includes Lekkie Nucleus Locker assembly only (Locker, bearing, flanged bearing bush, 5x grub screws). SplineUp chain-ring set not included.

Note: this product will only fit CYC Photon motors. Please contact us if you are unsure of compatibility.