I am looking to buy a transition bottlerocket and use it as a all mountain-freeride bike. I ride mostly Seymour and Fromme and always ride my bike uphill. I might also ride some cross-country with it. I'm 6 feet and I know Transition recommends a Medium frame, but because I also climb I am wondering if I should go with a large.
All depends on how you like the bike to feel. Iam 5'9 and rode a small, felt perfect for me, but I come from bmx and prefer a smaller bike, much easier to flick around. The bottlerocket will do anything you ask of it, at 6'0 you should be fine with a medium as the wheelbase will be larger. Just my opinion, good luck bro!
The bottlerocket is a great bike, i'm about 6 feet tall and i ride a large vagrant But if i were to get a bottlerocket, i'd definatly go with a medium.
That said, it's all about what you like a bike to feel like.
I am 5'9 and ride a small. My brother is 6' and he rides a medium. Has no problems other than he hits his knees from time to time on the bars. A long might solve that.