I'm looking at buying my first road bike, after riding mountain bikes for over 10 years. I'm 16 years old, but I'll be turning 17 in a month, so I'm not sure if I will be growing any more - although there's a chance I could grow more. As of right now, my height is 71 1/4 inches, or 5 foot 11 1/4 inches. From what I've read places me in the 58cm frame category. However, my armspan is 74 1/4 inches, 3 inches more than my height, so I think I'd appreciate a slightly longer reach. I've measured my inseam, and get about 33-34 inches, although I don't think I was measuring it 100% accurately. My dad is basically the same height as me, maybe 1/4 inch taller, and he rides. 60cm Trek road bike. I am obviously going to test ride a 58cm and 60cm, but if the 60cm doesn't feel bad for me, would there be any reason why it wouldn't fit me? I want s 60cm in case I grow my, and my long arm span. Worst case scenario, I could also buy a shorter stem. Bottom is, though, I want to buy the best size bike for a kid who might grow a little more.

Thanks,

John