Originally Posted by
Roasted
I'm not really worried about the number differences in terms of frame size. The point is I'm not comparing 54 to 56 of different manufacturers. I'm comparing the exact geometry specs down to the millimeter. I just was shocked to see the Specialized 56 was the right fit for me, yet the Specialized 56 is 10mm longer (top tube) than the Trek 56, yet I felt stretched out on the Trek.
Check head tube height as well. I think the secteur might have a taller one making the bike feel smaller even with a similar size top tube. I normally ride a 58 and when I rode the 58 secteur it felt a bit small. I was told by the lbs that specialized bike can often size one size larger than other brands. Might be what you experienced.