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Ah ha, I hadn't thought about it being a cube; that's not nearly as scary! Because I'm bad at maths/lazy, can you tell me what the drag would be from Ksyriums at 30km/h?
dglshrn-
About 22% of what it is at 50km.h-1. It's not quite that simple because the numbers in the table are a weighted average over a range of yaw angles appropriate to an elite TTer doing 50km.h-1, the weighting would be different if you were only doing 30km.h-1 because a given amount of crosswind would give a higher yaw angle.
gbj_tester
It's at 50km.h-1, and only 20W between best and worst. It's significant for racing, but if you're just pottering around at 30km.h-1 it's something you could measure but not notice. Since drag power is proportional to the cube of speed, a 20W difference at 50km.h-1 is only about 4W at 30km.h-1