My height is 5` 7" my inseam is 32" online carculator show me i need 55cm bike. I have two road bikes. one is 56 cm the other is 58 cm. Also i have one cannondale frame is 61cm i want to build see how is ride, that 56cm and 58cm is close to my size? the 56cm have top tube 55cm the 58cm have top tube 56cm which bike is closer to my size. And how i found what really bike size fit me.