Yes, my posts were a bit confusing. At the shop was the 54cm Roubiax Sport along with the 56cm Roubiaix. For whatever reason I definitely felt like I was sitting more upright on the 54 cm Sport. But maybe I need to go back and try them both again.
Since then I have borrowed my friend's 56 cm Trek ALR 5 gravel bike which he has outfitted to be more of a road bike. I felt the reach was uncomfortably long until I looked closer and realized he had a seat post that tilted back along with the saddle being pushed back as far as it can be on the rails. I slid the seat as far forward as it could go and it's better now. Still if I owned the bike, I would reverse the seat post if possible so that it sloped forward, not backwards. I can say the ride is more stable with this bike compared to my wrecked 54cm Synapse 105, I'm assuming because of the longer wheel base.
Guy I spoke with this morning says if looking for a bike now, I have to go with what the shops have in stock. Things it will be a couple of years before things are back to normal and they are just fulfilling orders placed a year ago. If choosing the 56 CM Roubaix should I be concerned about the Tiagra groupset vs 105? It seems like any bike costing $2600 should have 105 but I guess that is the tradeoff at that price point for having a carbon frame. The Roubaix sport is $3200. Neither is light change to me but the alternative is to live with my old but still reliable 25 year old Trek 7500 hybrid.
Originally Posted by
PeteHski
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.