mgreer wrote:
jcbesse wrote:
I would be quite easy for them to just show a picture of the 'rolling road' you'd think?The do on their website
https://www.sram.com/en/life/stories/life-on-the-rollingroad
https://www.sram.com/en/zipp/campaigns/total-system-efficiency
Thanks for that...those links led me to David Morse's "white paper" on the subject, that answers a few of the questions asked above (including PSD plots): https://www.sram.com/...s/tse-explained2.pdf
The constantly lessening power requirements with reducing pressure, for even a 28c tire, still is hard for me to fathom...unless the road surface roughness is REALLY bad, and/or the surface has additional compliance/damping than typical pavement...
...or, unless it means that their wider internal widths widen the measured tire widths so far that even 30 psi is above the breakpoint pressure for those tires, speed, and road conditions? I'm not sure if that's exactly a good thing, if that's the case...for a variety of reasons.
http://bikeblather.blogspot.com/