Yup. Looks like he’s been riding the GP 5000 TT TR in 28 for the road stages. Same tire in 25 for the TT.
Why were they seeking pressure improvements? were they at the point at which increased pressure would yield improved rolling resistance, or were they trying to run narrower tiers for improved aero, therefore needing to run at higher pressures?
A: that’s not the bike he’s been racing on.
B: that’s actual tire measurement, not “tire size”.
C: Did you actually read the article this pic came from, and what tire they Say that is? Hint: it’s the GP5000 TT TR 28
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A - for the most part, right? Wasn’t stage 10 contested on the Y1RS?
B - I get that, but I’m not sure what the end game for higher pressure is - if its to run a “28” printed tire for aero, I can’t say its gotten anywhere since a 30 on the hookless measures out to a 31-32 as well right?
C - Yes, I did, but do you know what tires the Y1RS had on stage 10?
Yes, he’s been riding the Y1RS. That pic is of the V5
IIRC, Josh actually talks a bit about this in the podcast that triggered the thread. Worth listening to. TLDR is that “tire size” is essentially shorthand for the bladder area of the tire, not the measured width. It’s a crap measuring convention, but it’s what we’ve got.
The GP5000TT in 28.
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I forgot the other thread I replied on, but I looked up the minimum tire pressures. In the case of 25C tires, it’s something like 3psi difference between min and max on hookless. Too narrow a window safety-wise, regardless of performance.
At 28C and higher there’s more buffer.
What @fredly said above. But more significantly, one of the articles I read on this said UAE’s specific ask of ENVE was for a rim that could run a 28 and be UCI-compliant.
I will try to find and post that article.
Did I miss something in the past year where the UCI was forcing teams to ride 30mm tires on hookless wheels? I didn’t realize this until 2 weeks ago. Maybe I missed a thread on this but it seems this wasn’t widely known.
It’s interesting that certain people have always insinuated that 28/30 must be faster because the pro tour riders are riding them. Whereas they are forced to because of rules and wheel limitations.
I cannot speak to what you might have seen or missed, but UCI recently (it could have been last year) ruled that teams must follow ISO/ETRTO standards for wheel and tire combinations. So, for 25mm internal widths, that means minimum tire size is 29c.
Pro teams want to run 28mm on 25mm wheels for best aero, but current UCI rules say 29mm minimum.
Pretty hilarious that Continental made a big deal about making these 30mm Archetype tires for Pogacar and he doesn’t even use them
What’s the reason behind this rule? Safer?
Am I correct in understanding that the answers to my questions are, “… No, you can’t provide specifics on the benefits you asserted? …” If not, how do you know they are really benefits?
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So much of this industry is smoke and mirrors. When the push towards wider tyres was initially on all the numbers were only about rolling resistance, but I was thinking ‘hey there is zero mention of any trade off from increased drag??’
Now I’m reading teams are running narrower tyres for aero purposes. Lol this industry… 
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On that point, we still haven’t seen any data showing wider tires are faster on decent road surfaces, assuming you aren’t reaching pressure limits. Most people to have just accepted that without any actual data.
Instead most of the time people are just running wider tires as sub-optimal for rolling resistance (too low pressures) vs the narrower tires they used to run and tout increased comfort.
I would say much of the industry is smoke and mirrors especially with many manufacturers now not even showing drag vs yaw plots for their new aero bikes/wheels.
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Who says he doesn’t use them?
Yeah, I am familiar with his excellent pressure calculator. But it’s free for folks to use.
So, l am puzzled how this ties into any conflict of interest regarding promoting or demoting hookless.
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psi’s are achieved through pumping?
True, but hookless need pumps too.
very true - in fact, an accurate / precise pump becomes even more important when the margins are so close to catastrophic, right?
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