Yeah, I can imagine that I would completely regret it if I went with a frame 2 cm taller--- mainly for the TT length--- the only real measurement that matters. My 57 Rush is set up the the same contact point measurements of a 58 conversion and a 57 Look that I ride. The 57 Look is larger than a 58 Trek, due to differences in how the frames are measured. Just saying.... the size is just a number.
I have 5 bikes--- so I have a point of reference myself. Furthermore, if you look at the geometry chart for the Rush, I have a hard time with the concept that a 57 is outside the range of normal. Also, this is track bike geometry--- with a higher BB than for a road bike, and different angles. The listed "size" of the bike is just a label. It is rather arbitrary that they measure it to the top of the seat tube (rather than the top to the top tube, or center of the top tube, or any other arbitrary end point).
But I agree--- my stating that my bike fits me perfectly doesn't mean anything to someone else. All you need to do is spend a few minutes around here to see how crazy people have their bikes set up to realize how blind this sort of advice is. But given the geometry of the Rush, I am not sure how relevent an online size calculator would be.
Originally Posted by
mihlbach
Seriously...you can't "imagine" riding a frame that is 2cm talller?
I'm not saying you are wrong, but I think its hilarious how people insist they have a perfect fit just because they feel reasonably comfortable on their bike, even if the size of their frame is outside the norm for someone their height.
How do you know your bike is a perfect fit? Can you really narrow it down to a cm or two of ST length? Maybe you can, but how is anyone to know if you (or anyone else) is full of ****.
I have seven bikes...none of them are the perfect fit, but I've ridden enough bikes and experimented enough to come as close as can be expected (and it has nothing really to do with standover, BB height, or seattube length). Nobody's perfect fit (if there is such as thing) is the same and to make matters more complicated, fit is a moving target. It changes with your fitness level or even riding style.
I think the best you can expect of these sizing threads is to give the OP some sense of the most common size frame for someone his/her height, but depending on your own personal physical peculiarities that still could be bad advice.
Good luck OP....you might also try plugging your physical dimensions into an online fit calculator, if someone else can provide the link. (I forgot where to find it). They usually do a pretty good job of getting you in the ballpark.