Originally Posted by El Diablo Rojo
I don't know what my FTP is on my TT bike as my coach always has me do my field tests on my RR bike. I do know that it took me awhile to get faster on my TT bike than I was on RR bike. Getting used to the TT bike and dialing in the fit were crucial to going fast on it.
+1 on the adaptation period. I'm not an expert or a TT stud (well, studette), but I can say it took a while for me to feel comfortable on my TT rig. Part of it was dialing in the fit and the rest was getting used to the new position. The first month or so was hard. Now that I've been riding it a few times a week for 2-3 months I feel much better.
I haven't done quantitative comparisons between the TT and road bike yet. However, it feels as if the power on the TT rig is maybe about 8-10% lower.