It would probably be banned under the same rule as descending on the top tube and the puppy paws position. I wouldn’t be at all surprised if that rigid positio

It would probably be banned under the same rule as descending on the top tube and the puppy paws position. I wouldn’t be at all surprised if that rigid position was really fast though. If I put the dropper post down on my mountain bike and get low when I am on a road hill I drop like a stone. I’ve often overtaken friends on road bikes doing that. Matej Mohorič used a dropper post to win Milan-San Remo this year. I could see them becoming a key aero tool on road bikes in future.