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Bloody hell, never seen that before! That's a lot more of an effect than I had thought. Just out of interest, where might a 32/32, box rim non-aero spoke build come on there?
dglshrn-
Just out of interest, where might a 32/32, box rim non-aero spoke build come on there?
I've seen some aero tests which use 32 round spokes in Open Pro as a benchmark, IIRC they come out somewhere close to Ksyriums. Ksyriums with zicral spokes really suffer not only from the terrible rim shape but also from the fat spokes, so they're probably even worse on the road than they are in the tunnel due to needing loads of power to rotate.
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That's a lot more of an effect than I had thought.
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
gbj_tester
Not sure that anybody would bother to test Ksyriums against modern wheels, but the old Roues Artisanales test shows them as much slower than Aksiums or Shimano R500s