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Hi looking at a bike with 56cm effective top tube (58cm seat tube) - would this be too big for me at 6 feet tall?
The 56cm length seems a bit short for a 58cm frame
I ride a 58 and i'm 6'4 (admittedly not as flexible as some). My road bike and cross bike both have 585mm virtual top tube lengths with 110mm stem fitted.
I wouldn't suggest a 58 frame for a six footer unless extremely long in the leg (stands back and waits for the STW massive to disagree :wink:)
HTH
Am six foot and I ride with ef TT of 56cm but most would say its on the small/low end for that height. But I've tried 58 and 57 too and find 56cm suits me. Depends on a lot of other body measurements besides height. And geometry to a degree.
What bike is it?
I am 6', 33" inseam and ride a Giant TCR with a 57cm ETT, but also a Cervelo with a 56.5cm ETT which is a tad more comfy if I am honest. I wouldn't discount a 56, you could always fit a slightly longer stem if necessary.
Totally depends on the bike, your dimensions and your flexibility.
I'm 6ft and ride a 58 canyon with a 56.6cm top tube and a 120mm stem. Its spot on for me but could easily go up or down a size without a problem.
I think the a frame described as a 58 is more likely now to refer to its top tube than seat tube and a 56 top tube and 58 seat tube is unusual geometry, I think?
What bike is it.
I would say that the 58 is about right unless you have odd body proportions, but you can't beat actually trying the bike.
james - YGM