sounds like it may be wise to not ride faster than 160 Km/hr for the first 100Km or so
Flats or hills doesn't matter. Some hubs need adjustment after the first ride or 100km. Some hubs free up and initially ride with a little noticeable resistance. My wheels with ultegra hubs needed none of the above but the wheels with Chris King hubs specifically mentioned the above in the manual.
Sorry to go off topic, and i did agree with you for so long also but have now changed my mind.
Attached is the owners manual for the Focus 140's, it has long been discussed and many many reviewers have their thoughts and its now included in owners manual that speakers do actually have a BURN IN time.
My old speakers Duntech and later Soniques 7.5's shared some of the same owners and engineers, both agreed the speakers need time to loosen up.
The sound engineer that set out my Bar also told me to wait some time for the speakers to run in before I pass judgement but that is different.
I always thought it to be a forum myth and hear-say but having witnessed the difference, I am a convert and having it written in manual where no doubt the dansih company spend big bucks on RD, there must be something in it.
Thoughts or a seperate discussion.