I am just starting a build with a Bafang middrive motor. Putting into a Giant Trance full suspension bike. Right off the bat I am seeing 2 issues.
1. The bottom bracket is a pressfit style. So the diameter of the bottom bracket is larger that the shaft of the motor that goes thru the bracket. Looks like I need to come up with some sort of adapter or bushing for that. Any recommendations on where I would find something?
2. The bottom bracket measures 77mm, so I ordered the 74-100mm motor kit. But when I slide this in thru the bracket there are not enough threads on the shaft to be able to tighten it all the way down. The kit came with a bunch of spacers, but is seems like if I use these the motor will be even harder to tighten down enough so it doesn't rotate. I am wondering if anyone has been through this. Ideally I would find a tap the same size and add more threads to the shaft but this is much larger than anything I have.
Thanks for any help
1. The bottom bracket is a pressfit style. So the diameter of the bottom bracket is larger that the shaft of the motor that goes thru the bracket. Looks like I need to come up with some sort of adapter or bushing for that. Any recommendations on where I would find something?
2. The bottom bracket measures 77mm, so I ordered the 74-100mm motor kit. But when I slide this in thru the bracket there are not enough threads on the shaft to be able to tighten it all the way down. The kit came with a bunch of spacers, but is seems like if I use these the motor will be even harder to tighten down enough so it doesn't rotate. I am wondering if anyone has been through this. Ideally I would find a tap the same size and add more threads to the shaft but this is much larger than anything I have.
Thanks for any help