Bafang BBS01、BBS02、BBSHD 電動自転車用ギアセンサー - スピードセンサー

Works great, 100% with easy install !

I installed this on a new bike I was converting with a BBS02. The bike is for my wife, and I didn't want her to have to worry about the drivetrain binding/stressing during shifting. This device works perfectly and cuts the motor instantly when you move the gear lever. It seems to stay cut out for exactly the right amount of time, and it's hardly noticeable. I won't say the installation was super easy. You have to remove the sheathing from the cable, cut it, run the cable through the sensor, and then the tricky part is getting the sheathing back on. The cable wants to unwind, and if a rogue strand doesn't find it's way back in to the sheathing, it is kind of a nightmare. After some persistence and a couple of stab injuries to my fingers, I managed to get it in. Maybe you'll be lucky and get it on the first try. Anyway, besides that, the sensor was really easy to mount to the bike, and the plug fit perfectly into one of the reserved sockets on the BBS02. I'm really happy with my decision to get this for my build.

Easy to instal and works well to help make shifting of gears easier while motor is running.

It's fairly simple. Install this on your bafang mid drive via the waterproof connector. Make sure you match it correctly. Run your shifter cable through the other end. It senses when your shift cable moves, and briefly cuts your motor off, allowing your derailleur to safely shift before power returns. This will prevent rough shifting, greatly reducing your chance of jamming your gears, or breaking your chain. If your kit didn't have one of these already, you absolutely need one.

I recommend this for the Bafang mid drive motor because without it you can get some pretty hard gear shifting which might damage the gear train. This device makes shifts very seamless.