As I have said elsewhere, I have very old bones so love full suspension for going along canal tow paths and thro' the forest. 44lb is great, my two TSDZ2(B) lightweight builds are just either side of 40lb, but only have 36V 10ah / 48V 7ah batteries fitted which give me a 30 mile max range at best, charging time is yes a pain so I am lucky that I can switch bikes. But I have two grandsons who visit and nick both bikes for a ride out. Yes, have tuned both drives so they perform more less the same all be one is 36V and the other 48V.