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Crit racing-tubeless tire pressure

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Crit racing-tubeless tire pressure

Old 03-22-19, 07:58 PM
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denvertrout
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Crit racing-tubeless tire pressure

I am new to tubeless this season. I used to race clinchers at 110psi, last year went to 90, and didn't really feel the difference. This year did some crit practice on the course for tomorrow and rode at 85 on the tubeless. Again, don't really feel the difference. Last weekend rode a road race at 85, and it must have been comfortable as I never paid any attention to them, rough and smooth roads. Another racer last week was riding tubeless at 110. So all confused. I thought the trend was going lower. 25mm width. Two weeks out is a road race part dirt roads and part pavement, was thinking 85 again. What do you all run for crits and road races?
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Old 03-22-19, 10:52 PM
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Ttoc6
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Lower. Take a look at the chart enve suggests (very bottom of the page). It's surprising how low you can go. 85 psi is on the high end for modern, wide tires. Especially when set up tubeless. Realize you'll have a bit of "raw" rolling resistance loss, but overall it should be better. The rider on 110 is wrong.

https://www.enve.com/en/products/ses-7-8/

Also give this one a read for a bit more information about tire pressure selection (etc)
https://www.bicyclerollingresistance...000-comparison
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Old 03-22-19, 11:39 PM
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110 tubeless is bonkers, even if in 23s. I'm 215lbs, and run 85/90 in 700x25 Giant Gavias.
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Old 03-23-19, 06:16 AM
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Thanks for the charts. Wow, 66psi for a 170 lb rider on 25mm tires, that seems crazy. That is ok for high speed turns of a crit? Will try dropping today to upper 70's and see how it feels. Running the gp5000tl.
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Old 03-24-19, 08:13 AM
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At 165 and 23mm tires (that measure 26mm on my clinchers and my limited tubeless run) I've always settled on 95/100 or 100/100 on clinchers, tubeless, and tubulars.

When I stand up I don't like my front tire "bobbing" that comes with lower pressure, and less than 95 always resulted in pinch flats in my clinchers.
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Old 03-25-19, 07:46 AM
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I'm at roughly 70kg, I run 80 front, 85 rear.
Hutchinson FUSION5 Performance - 25c.
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Old 03-26-19, 07:36 AM
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Originally Posted by denvertrout View Post
Thanks for the charts. Wow, 66psi for a 170 lb rider on 25mm tires, that seems crazy. That is ok for high speed turns of a crit? Will try dropping today to upper 70's and see how it feels. Running the gp5000tl.
We are living in beta. I share your concern and don't think any have perfect answers yet. Only thing I can tell you for sure is measure your tires. With a caliper. If you don't know for sure what the tire dimension is the discussion gets meaningless. And many tires are going to be smaller at 66 than at 100 so moving targets everywhere.
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Old 03-30-19, 07:45 AM
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Well, I ended up running 80 psi front/back. Felt good, actually felt great! I don't know if that was the pressure or the GP5000tl tire itself. I have for the past several years lost all nerve to nailing corners so find myself at the back every race, move up with 2 laps to go and finish well. This race I moved to the front at halfway and stayed at the front. Wheels felt glued to the road, even the rough corner I was confident in. Will stick with these numbers for a few races then maybe explore more/less later in the season.
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