I asked that because obviously I don't know. No I've never heard a geared hub motor with metal gears. I imagine they use nylon gears to cut down on cost so its not like metal gears couldn't be used. I do know that Luna Cycles sells metal gear replacements to replace the nylon ones in the bbshd kit by Bafang. The reason I posed this question is because I read in another forum that the Das-Kit has metal gears. Just a honest question i was asking.
I could be totally wrong here, but whatever it is, I think it is more durable than Bafang. I haven't read of any Das Kit motor failure here, or in the Magnum forums. Bafang I have. Then again Bafang is a larger company so more opportunity for one or two to go bad.
Either way, isn't the bike and most, or all, of the components made in China anyways? I really feel like NCM is just an office in Germany that outsources almost everything to China and *maybe* NCM has their own QA folks in China too. That's not to say it's bad quality, I've purchased some very high quality items from AliExpress before and I think NCM bikes are great, but I think that's what is going on here and that's why you get a good bike for around $1500 or less, way lower than a lot of bikes you find online.