I would agree with the previous post. I am 5'11" and have the 54cm BK and I really like the length of the TT. I also own a KHS Flite 100 (57cm) and find that the TT is a bit too long. I'm actually looking to find a short stem to compensate for the stretch. The Bareknuck is the best bike I've ever owned and everyone who's riden it agrees. Go for it. You wont regret it. I recomend the 54.