i might need to take a closer look, but what i saw were comparisons on 2 bikes, and at 2 speeds. on 2 bike, the wheels were almost identical. on the other bike, the only area where the 7.8 really outshone the 6.7 is a 15Â° yaw. my takeaway was that this yaw is likely to be experienced either as a constant sidewind, with a lot of stalling going on when using a deeper wheel, or you'd see it in a gust of wind from the side, and that's also not a fun experience. so, i'm not sure how much value it is to have that 7.8 outperform the 6.7 if you're crapping your pants trying to handle bike at the one condition where the 7.8 wins. and even then, that better performance was exhibited on the ENVE custom road, but not on the tarmac.
I think you're focusing on the 20mph chart. I was focusing on the 30mph chart, which seems to indicate that as speed increases, so does the advantage over the 6.7 The data also seem to suggest that the DT ARC 1100 wheels are fast, especially at speed and low yaw angles.
here are the two 30mph charts:
the difference between these 2 charts is the bike that acted as the test mule for each of these wheelsets. when all the wheels were on the tarmac, it seems to me that the 6.7 and the 7.8 were pretty close. the only real divergence between the performance of these wheels at 30mph was when they were put on the ENVE custom road bike, and then only at 15Â° of yaw. is that what you see? or do you think i'm reading the charts wrong?
then i have to ask myself how often i see 15Â° and what is going on when i see 15Â°. because, if i've shat my drawers when that sidewind hits me and almost puts me on the ground, that speed value is of questionable import. one thing that i have been asking for, for more than 20 years, and i've never gotten, from anybody who performs wind tunnel testing, is what kind of torque is applied to the fixture at various yaws. nobody actually tests handling, and i think you could do that. i'm dumber than a sack of hammers, and i can even think if a protocol for that.
so, this the question to me. what wheel is really the fastest between the 7.8 and the 6.7, and i don't think that's a straight-up slam-dunk easy-to-answer question until you factor in handling. if it was reversed, and the wheels tested the same at 15 and 10Â°, but the 7.8 kicked the spit out of the 6.7 at 0 to 5Â°, then yeah, point taken for sure.