Originally Posted by
meanwhile
7.5mph is about 3.5 m/s. At this speed
- Wind Resistance = 1.9 kg m/s2
- Rolling Resistance = 2.9 kg m/s2
http://www.analyticcycling.com/ForcesPower_Page.html
However, remember that TYRE wind resistance will be only a small part of total WR. Adding 10mm in tyre width might increase WR only by 10% - a mere 0.19N of extra force. At the same time it reduce RR by 20% (going from a 23 to a comparable 25 cuts RR by 5%) - so that's a reduction of around 0.6N of RR!
I'm not sure what you're point is. 1.9/(1.9+2.9)=0.40 which is pretty much what I wrote. It's also clear from the original post I responded to that the comparison was total rolling resistance to total aero drag.