Broke the spindle on my fatbike the other day, 100mm motor. I was tuning in the pressure on the front fork, so I put a lot of weight on the pedals, and the drive side just snapped. Thumbs up for Ebird store for just shipping out a new one for free. Told me they were stronger now, but Im nor sure about this motor anymore for my riding. The fatbike had only 300km, but a fair share of those were single trails. Weird thing is on my other bike, a full suspension sees jumps and drops all the time, but after 800km not a single problem (well, a blue gear failure, but that was my fault). The fatbike sees way less abuse, and is mostly used for slow rides.