borist wrote:Remove the fins when you'll be doing any driving at higher speeds and putting the board on a roof rack (I might leave them in for a very short, slow drive around the spot, but that is about it).
My concern is not about whether air flow puts too much pressure on fin boxes. It is all the other nasty stuff that could happen. Like forgetting that you have extra 50+cm on the roof of your car and driving into a garage, extra forces that load up roof rack and straps that could fail, etc... Over the years I've seen few formula (wsurfing) boards blown off the car roofs due to some kind of attachment failure. If the board was in the bag without fins it survived OK, otherwise it was just a pile of rubble.wdric wrote:When you think about how much pressure you put on your fins while driving upwind and how much flex they apparently get and the fact water is way more dense than air, I would think leaving the fins in the board providing it is pointing to the front of the car then travelling along a road at 100km is a walk in the park for them and shouldnt damage at all
Fins are so thin that while pointing directly into the wind they would have very little drag.
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