I decided to give my Specialized Roll another try .
I raised the saddle and moved it forward . This seems to work and after riding six miles today , my knees feel no worse than if I had ridden one of my other bikes .
Switched the chainring to a 30 tooth to make it a hill climber .
If this works out , I’ll be willing to invest in a new wheelset with a cassette instead of a freewheel. And some different tires .
Ive always like the looks of the Roll frame .