Thank you for your clarification question. In my case, a group of women riders who often ride on our groups rides were going on a women only trip on the Katy Trail. My wife considered going along. So I cleaned up her bike and got it in working order. Its not a very good bike. Anyway, she rode 20 feet, got off, and said she would stick to the tandem. She said she felt wobbly, etc. Given the right motivation and time I'm sure she could get comfortable...If she ever got comfortable, I would suspect the truth is that she would never want to go 50 miles. She really really struggles uphill (when she used to ride a single and now on the tandem).

Needless to say she is exercising a lot recently on a treadmill as well as some in the weight room, so it is very likely that her strength and stamina will increase. Even if it does, however, I don't think she would ever want to ride 50 miles on a single bike. Who knows, maybe she will prove me wrong. Really, it doesn't matter to me if she rides on a single bike or not, just as long as she will ride with me every once in a while.

I will go back to write earlier, and I think it most of it has to do with motivation and desire.