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Oh no I have a custom frame, there were just not many people talking about the motor online and this thread was in one of the search results. The m630 seems to be naturally geared with a little bit less top end speed compared to the m620 but that's not a problem at all, its a little torque...

The Bafang ultra's of old were known to have minimal grease in them. People who used cornhead grease in them loved the outcome. Even with a beefy mid drive like the m620 you should mostly be only using 3 of the granny gears since the m620 is powerful enough to get you up to 40 mph anyways when...