Gear Sensor: NEW, GS Model, for REAR Derailleur and Internal Gear Hub

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This is the new GS model in 2017. This brand new model is universal for rear derailleurs as well as internal gear hubs (including Rohloff and NuVinci hubs).

The Gearsensor acts like a speed shifter so you are able to shift your bike at full throttle and barely fill the throttle cut off.

It will make your BBS02 or BBSHD shift faster, smoother and safer. 


The gear sensor can be installed in either dirrection as it detects shifting in either dirrection. It can be installed with the cable in the forward or rear dirrection. 

Here is a link to the manual and installation guide on the Gear Sensor

The Gearsensor is plug and play with any BBS02 or BBSHD in place of one of your ebrakes and is a 15 minute install. 

If you install it with our newest edition of BBS02 or BBSHD (the ones with the luna cycle logo engraved on the side) the controller has a separate ebrake connector so you can use both ebrakes and the gear sensor. If you go with this setup the shifting power delay is much shorter than using the ebrake connector.

However the gear sensor will work with all bafang mid drives by simply connecting it to one of the ebrake cut off switches.  It will also work with any mid drive equipped with an ebrake cut off as long as the user can rewire it to fit their ebrakes. 



  • 4

    Posted by Brian Laird on 13th Nov 2020

    Fitted easy but didn't have the caps for the outer cable as shown in the instructions on youtube.

  • 3

    Posted by Joshua Stretton on 16th Jun 2020

    This equipment work but it wasn't clear which direction the cable had to enter (or if it was only one way). So I looked at a few videos but thought that the electrical cable should point towards the front of the bike rather than the back. Overall not bad and a good investment if you want to cut of the motor while changing gears. Hi Joshua Thanks for the review. The sensor can go either way. I have changed the listing to reflect this. Regards Luna mate

  • 5
    Gear Sensor is very effective

    Posted by David A on 3rd Oct 2018

    I purchased this as an extra to my BBSHD kit. I did a quick fit without the gear sensor and then fitted the sensor later. The difference was considerable and well worth the investment. The whole gear change is much smoother as the strain is removed while changing my derailleur. I would certainly recommend purchasing this to add to your BBSHD kit.

  • 5
    Smooth gear changes

    Posted by Brett Lyons on 7th Sep 2018

    Didn't take long to install makes gear changes a lot smoother no more clunking and banging

  • 5
    Does the job

    Posted by Martial on 19th Apr 2018

    Reasonably responsive to gear changes. Would like it to be a little tougher as it does need to go in a vulnerable spot on the bike. Otherwise does what it says and takes the strain off the chain and sprockets.