Originally Posted by Doc_Wui

I've converted bikes to the three lower cost mid drives, bafang BBS02B, Toseven DM02, and Tongsheng TSDZ2,

If you want the proverbial two wheel locomotive, the BBS02 pulls like a train. I've put 1600 miles on one I converted in 2016. The TSDZ2 out of the box is weak and requires strong pedal effort, but the third part firmware (free) makes it respectable, My wife and I have 4200 miles in the last two years on a pair of TSDZ2 conversions with OSF firmware. The DM02 has plenty of power out of the box, and the torque sensor works well, I have 400 miles on my DM02 conversion.

Based on actual measured currents from riding them, I believe a newer BBS02B will draw about 18-20A max from a 48V battery, while the other two are 14A max. For commuting, you want the bike that goes the fastest with the least effort, so you can concentrate on safe riding rather than pedalling. The BBS02B would be best for that, The DM02 is good for solo riding at 16-18 mph. The TSDZ2's are for bike path riding with your friends.