My gym has one upright exercise bike. It's a Stairmaster brand. The seat is so freaking wide. I don't understand how anyone could sit on the thing. I usually avoid it by getting the cardio portion of my workout other ways. I really don't like riding in the rain. I find cars don't see you as well and the rain adds a lot of bike maintenance.

I have to sit on the very tip of the saddle or lean unnaturally back to tolerate the seat. Are there narrower seats available that use the proprietary exercise bike attachment system?