My ride for the past 6 yrs has been a 58 cm Specialized Allez Elite with a 58.2 cm TT and 110 stem that is +18 degrees. I recently received a nice gift: 58 cm Focus Cayo Expert with a 57 cm TT and 110 stem that is +15 degrees. The Specialized fits me like a glove. Comparing the two; the headset/bars on the Focus are a good 3 cm lower than the Specialized and the TT is obviously a little shorter. I have my saddle height the same. The Focus rides like a dream, but I notice a little discomfort in my lower back 30 minutes in to a ride. Plus, it just feels a little awkward positioning since I'm so used to my old bike (I am not flexible at all...can't touch my toes). Question is; do I change the length of the stem or the length of the stem + the stem angle? I am also going to move the seat back a little and see what that does.