Originally Posted by
Roasted
Did you by chance find that the Giant bikes run a bit larger in size? The 53.5 I tried out felt bigger to me than the 56cm Trek 2.1 did (in some regards).
Giant uses compact geometry on many of their models. A M/L or 53.5 has an effective top tube length of 56 for the defy and 57 for a TCR. So the 53.5 Giant could be bigger than the trek 2.1