Originally Posted by
Wren
Probably something that feeds into this problem is that I've had to raise the handlebars way up due to carpal tunnel syndrome. That solved that issue, but if I have to get off the saddle to stop, then I feel I'm jammed between the seat and the handlebars.
Ah ha! This could be the issue right here.
Your Cannondale Comfort 400 has an adjustable stem. When you raised your bars, how did you do it? Were you able to use a multi-tool, or did you have to use a big wrench?
If the former, while you raised the bars, you also shortened the effective stem length, bringing the bars closer to you, which would certainly make you feel cramped and having to slide back on the saddle. BTW, I see this all the time when riding on the MUP. It's a common error, so don't feel bad if that's what you did.
The way it needed to be done was to leave the stem angle alone and raise the entire affair by loosening a big ol' nut on the top of the head tube. That's how you raise/lower the bars without changing their distance from the saddle.
If you're not sure what I mean, a quick trip to the LBS can help you out. I (hope I) attached a photo that may help.
Either way, a fitting is cheaper than a new bike. Try that first. Worst case, it won't help on this bike but you'll know sizes and measurements to look for when shopping for your new one.