About 50 miles into the bike I always wonder what the hell I'm doing this for. It all started when I said I thought I'd be able to do an Ironman and an unnamed relative laughed hard enough to make me want them to prove I could.Yeah, my limit is like... 10mi. I never have any desire to do more than that - unless you count doing Hood to Coast where I do three 7mi runs in a 24hr period. That's about as close as I get to any long distances for anything.