Originally Posted by
rms13
There is no 54 ;-)
There is a 53 which they recommend for riders 5'9-5'11 which has a 55cm top tube. The 51 has a 54cm top tube. I think a longer stem will make the bike a perfect fit for OP
I agree with the sizing guide advice to go with the 51 cm for the OP. I'm an inch shorter than him and for me a 54 cm would work perfectly. It does have a 54 cm top tube, which sounds about right. Nothing a stem riser and better stem wouldn't fix to dial in the height.