We had a good article in the local paper about a 70 year old guy that just couldn't keep up with his younger bike buddies anymore. These guys would go on 30 mile rides and he couldn't keep up (18-22 mph). He was a popular guy in the group and it was a sad story......until he bought an ebike. Of course now he keeps right up with them and they have a great time.....I think you should look into the ebike segment