I got my new xc100, it looks great except for a gouge or two, took it for a ride this evening, everything seems to work fine, went out my drive i P2 5 th gear, really liking it so far went to a very steep hill the regen didn't seem to work, fiddled with it a little going down another fairly steep, regen seemed to work great coming back I stuck it in P3, didn't seem to have regen going down that steep grade, hit the sister incline and the motor didn't seem to pull at all,I shifted down to second or third and it seemed the motor had no power( tell these things are not that weak please, the 2 36v 500 watt builds I did would eat this thing for lunch-is there something I am missing on this bike, am I going to have to swap the rear wheel for the new 7spd,750/1000 27.5 wheel I have from risunmotors?I am happy with the weight of this bike,I thought the 48 volt almost 1/2 hp motor had more grunt than that, sorry this is not a reply, its a query( Bill Gates doesn't love me unless I update{I am officially an"update resister}