I have a Raleigh Tekoa IE. I used to be an avid rider until age started getting the better of my knees. About 3 years I quit riding because I couldn't handle hills or long gradient climbs anymore. At the time I had considered E boosting my bike but supplies and information were limited. Recently I starting looking again because I simply have to get some weight off and get myself back in shape. I live in Eastern TN and have a hilly excersize run that I can now accomplish on the Raleigh. I have experimented with different front chain rings and have the bike to a point where it is easy (on my knees)to pedal with no assistance and I can get about 30 miles in level 1 assist traveling at 10-15 mph. The Raliegh no tops out at 22 mph assist and on flat ground I can get up to about 27 mph on my own. I don't exactly know what my cadence is but would guess in the 40-60 range. I am at 280lbs 6' tall with a target weight of 225lbs. I have been looking at Haibike, especially the Sduro hardseven 6.0. I would like to extend my range while staying in the 10-15mph range so I don't run off and leave my wife in the dust. Target distance would be 40 miles. I know the answer is ride 10 at 0 assistance and then turn it on. I have found that my knees will handle the distance if I maintain a low level of assist through out the ride. I prefer to stay with a mountain bike type format and a well known reputable company ( not a fund me operation ). Your input is greatly appreciated