60cm top tube. I'm 6ft4 so figure it'd be the size to try.
The sizing seems to make a bit more sense as the frames get bigger. The top-tube on the 46 we have is 51cm with an effective of 53cm :s
@Howard started
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The sizing seems to make a bit more sense as the frames get bigger. The top-tube on the 46 we have is 51cm with an effective of 53cm :s