I've been having challenges with my bike tires. I would get through half a workout on my trainer, and the back one would go flat. I finally (after 4 trips to the local bike shop) got the issue figured out, and the tire has stayed inflated for a few weeks. But, it was with a lot of nervous, promises from DH that he would come pick me up, etc, that I headed out the door Saturday.
The ride was harder than I thought it would be for a 30 miler (rolling hills - only one short, steep...