Originally Posted by
geepondy
Yeah I posted quite a bit about it in another thread. I'm 5'10" and I tried a 56 cm Roubaix and a 54 cm Roubaix Sport. The 54 put me in a more upright postion which I liked and not that much more aggressive stance meaning the seat adjustment was not that much more higher than the handlebars for the 54 over the 56. I definitely like being more upright. But everyone I talk with seems to think at my height I should go with a 56 cm. I spoke with a professional bike fitter at a different shop and he says no way he would git me on a 54. But as he mentioned there also is a lot of variances between the different bikes.
If choosing the 56cm Roubaix I'm saving $600 but giving up better wheels and going down to Tiagra vs 105.
I remember your other thread. I still don't understand how you would be sat more upright on a 54 Roubaix vs a 56 Roubaix. The stack height on the latter is 20 mm higher and yet the reach is only 8 mm longer. Last time I mentioned this you were comparing a different bike (Trek I think) against the Roubaix in a 54 v 56. Which is apples vs oranges.
Anyway if you prefer a more upright position and you are in-between sizes, the usual solution is to go for the larger frame and fit a shorter stem. Otherwise you will end up with a load of head spacers on the smaller frame (and the Roubaix is limited on stem height adjusment).
I would go back to the shop and try them both again.