Extension Modification Kits-100mm and 120mm Easy Install Bafang BBS02

Works as described.

Installation (taking apart the motor) was NOT easy. But the video guide was mostly sufficient. It would have been nice if, in the second half of the video tutorial Abbas didnt speed up the video, but explained every part that was going back in the motor IN ORDER, because otherwise there was a lot of back-referencing earlier parta of the video and coming back, which is extremely annoying enough in its own but especially so when your hands are greasy trying to follow the guide while putting the motor back together.

Also in the video Abbas says the rubber seal is only $5, but is listed as $20 in their shop. Didnt need to replace it but just of note.

The product itself works great, exactly as intended.

Unfortunately there is nothing physically binding the extension to the shaft, so when you try to tighten the bottom bracket, you are essentially pulling the extension towards the drive axle end bearing/nut, which cannot sustain any load. The solution I feel is best is to drill and tap 4 holes, with studs to prevent any movement, and an epoxy applied where the extension meets the original housing.

Came fast and worked as described