apparently YOU did not read the post..
the bafang bottom bracket spindle was damaged / bent on the first small jump and the bike has not been ridden in the same manner since for fear of further damage to the motor unit
and possibly rider!..
since i guess you can't read well maybe i will try to spell it out for you here..
from: http://endless-sphere.com/forums/viewtopic.php?f=28&t=64827#p973370
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Anyhow, upon arriving at home, I took the left crank arm off, and spun the drive side.
The spindle wasn't spinning centered..
I'm pretty sure this little wall drop was the culprit in during my test ride. The landing felt great that night as both wheels hit the ground nearly simultaneously.
I've done this many times before with square taper BBs on regular bikes without fail, but China quality, similar to their customer service, is like rolling dice.
I think it's safe to say that if you're interested in this kit and part of the joy you get from riding is from jumps, drops, etc..., this is likely not the kit for you..
I may end up going back to a GNG belt drive & Cyclone ISIS BB. Though crude and certainly more noisy, it's simply bomb proof at factory power levels. Even though my e-bike builds were built with commuting in mind, it gives me peace of mind knowing they can take my level of riding..
http://endless-sphere.com/forums/viewtopic.php?f=28&t=64827&start=25#p976444
If you plan on riding just streets or smooth dirt paths, I do feel the BBS-02 is the better fit especially with your mileage. If you plan on doing jumps and actual technical trail riding, and noise isn't an issue, go GNG chain drive..
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NO evidence that bafang can survive aggressive offraod / freeride..
plenty of evidence it can't.. again where is your bafang jump video???
EMPowered said:
Still no proof, apparently you did not read the post you linked to. The crank arm came loose, nothing bent, nothing broken and he was able to ride his bike with no further issues after tightening everything up. Sounds like his biggest issue was chain slip. It is important to measure chain stretch because this will cause your shifting to be rough and can contribute to the chain coming off. A new chain should greatly help the chain from slipping off. If you don't have the chain stretch measuring tool, your local bike shop will be able to measure it for you.