I had my Specialized Rockhopper 23 Mountain bike converted to a pedal-assisted eBike. It is a mid-drive unit mounted below the modified crank. The Rockhopper itself if in very good condition operationally and appearance-wise. The tires were upgraded to semi-wide and have had very little use. I would guesstimate that I have put less than 100 miles on this bike since it was converted. Health reasons limited my use and enjoyment of it so it has sat in my garage for a few years now. Look at the pictures. I think you can gather most of what you would like to know from them. Please ask for any specific information or questions you may have