Re: More bicycle efficiency tech

Zen Cycle <funkmaster@hotmail.com> wrote:

On 12/27/2024 1:50 PM, AMuzi wrote:

We converse often here about considering the bicycle+rider as a unit for
aerodynamics, for total mass, when looking at CG in a corner, etc.
 
Here, some further thoughts on that complete unit as regards vibration
and heat losses:
https://www.renehersecycles.com/the-missing-link-suspension-losses/

 
I find Heine's blog posts interesting and informative, but he usually
makes some claim that I just roll my eyes at. This time it's "In the
past, 4 bar (58 psi) would have been a sign that the tire was losing air
and almost flat—time for an urgent wheel change. Today that’s the
pressure Tadej Pogačar runs on the road."
 
um....no.
 
Very few pros run pressure that low unless they're racing gravel or
terrain they expect to be rough (Strada Bianchi, Paris Roubaix,....),
and even then...
 
Strada Bianche 2023 From
https://velo.outsideonline.com/road/road-racing/strade-bianche-tech-the-tires-and-pressure-the-pros-raced-with-over-the-white-roads/
 
"Tadej Pogačar, for example, raced on 28mm tubeless tires, with 4.9bar
(71psi) on the front and 5.2bar (75psi) on the rear tire. "
 
"Greg Van Avermaet...5.5bar (80psi) and 5.8bar (84psi)"
 
"Quinn Simmons (Trek-Segafredo)...4.4bar (64psi) in the front, and
4.8bar (69.5psi) in the rear."
 
"Tim Wellens.... 4.1bar (59.5psi) and 4.8bar (69.5psi),"
 
Heine apparently got that information from this article:
 
https://www.cyclist.co.uk/in-depth/tadej-pogacar-bike-2
 
Which rather sublty simply lists the pressure in the "spec" table:
 
"Tyres Continental GP5000 TT TLR 28mm 55-58 PSI". with no supporting
reference.
 
Considering Outside got the information from actually interviewing
people versus Rene Herse which is essentially hearsay, I'll take the
Heine article with a grain of salt, as usual.
 

He does like to self promote rather and does the opinions presented as fact
etc.

Roger Merriman