I did 31 moderately hilly miles only tank of a hybrid. I averaged 12.2 mph. I was planning to ride this bike until I built up to 50 miles and then decide if i can do a century on it but now I'm not sure. I think I really need to resolve my road bike woes. Oh and I passed on the trek pilot 5.0 so I either have to figure out how to make my Klein more comfortable and feel more stable or I need to think about what bike I really want to end up with.