I am the classic, "used to be athletic, strong, etc when I was young" kind of guy who now finds myself overweight with bad knees. I have a 30 year old Trek 18 speed hanging in my garage but a bit concerned about putting it back in riding condition due to my knees. I have a bit of a hard time walking normally and have real difficulty with steps; going up or down. Nonetheless, due to countless other medical problems I've overcome, I have become overweight by about 40 pounds and need to shed this weight. Since a treadmill is out due to knees (I used to use a Nordic Track), I am considering moving back to some kind of bicycle so I'm wondering what the pros and cons are between an Wedge and Incumbent as far as the impact either has on the knees.
Any input is appreciated in advance.