Bafang BBS02B 48V 750W Mid Drive Motor Kit

I bought this kit with a 17Ah 48v Battery. Arrived in about 3 days very well packaged. Fitted to my Trek 4500 mountain bike no problem but I had to make a bracket for the down tube as the bottle bosses were in the wrong place. (I have since mounted the battery on the carrier). With a 9 speed (11 - 34) cassette this kit on assist level 1 in 8th (13 tooth) gear wants to do 25Km/hour. On assist level 2 it wants to do 33Km/hour. I sometimes use level 3 for a few minutes (48+Km/hr). From a Full charge down to 20% I got 85Km. This is a great kit and my road cycling has improved as I'm getting more saddle time. My only problem.....I let my wife borrow my bike, now she wants one of hers converted! Review submitted 08/20/2019.