Biking Techniques (Part 14)

Cornering

Going round the corner is much more important than reducing drag. For one thing, you're going slower in the corner anyway, so drag doesn't count as much. For another, your exit speed depends more on taking the corner correctly than on reducing drag. Sure, as you exit onto a straight, move across further into a tuck as the bike straightens up, but it's not as important as getting the corner right.

Having said that, there are some very fast corners where it will help to stay in a tuck. If you can take a sweeper flat out without coming near touching down, for example, you'll be faster if you can stay in a tuck through it -- and remember you can still lean in some while maintaining an aerodynamic tuck. But again, get the corner right first before you worry about drag.

From TrackDoD Novice Group Orientation