I finished the book last night.

They all had TT bikes but they weren't always with them. Lance had 2 (or 3?) so he had a spare to use when on the road. The rest of the team only had their standard issue road bikes with them when the season was on, so they couldn't practice TT on off days etc. However, if the whole team had TT bikes and road bikes with them in the pre-Tour season they'd need a lot of extra vans or trucks to carry them around. IMHO Floyd should have bought his own bike and kept it at his Euro-home (Spain, France - jezzz I forgot already!) to train on if he ever got the time to do it. If he were to bring a TT bike along during the season I wouldn't be surprised if he'd have to supply is own car (and driver!) to carry it around as well!