I just received a new Giant Prime Mid Drive e-bike with a Yamaha motor. It is my second mid drive after putting a Bafang on my mountain bike. I am bummed that I can't check it out under power yet, as the bike shop in Europe wouldn't ship a battery overseas, so I bought it without the battery. I have been looking for a compatible 36v rack mount battery. It rides nice without power, not much drag. The Shimano Nexus 7 speed geared Hub works good,will have to see how it holds up under power.