this post was submitted on 19 Oct 2023
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About Silca's tire pressure calculator (lemmy.ca)
submitted 1 year ago by [email protected] to c/[email protected]
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Has anyone applied the pressure recommendations given on Silca's site: https://silca.cc/pages/sppc-form

From what it tells me, I can safely put in 30 to 33 PSI of pressure in my Schwalbe Marathon GT 365 tires (26"x2") on poor roads. This would be below the min 35 PSI listed on the tire, and about 20 PSI lower than what I've ever run them at.

I'm not too terribly worried about punctures, but do worry about pinch flats.

Thoughts?

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[–] [email protected] 1 points 1 year ago (3 children)

I've found it to be pretty spot on for road/ gravel tires. Make sure you err on the side of sticking with the manufacturer minimums regardless of the recommendations from silica as theirs are more general and they don't know exactly which tire/rim combo you're running.

[–] [email protected] 1 points 1 year ago (2 children)

Yeah, I think even the tire minimum (35 psi) is too low! LOL I'm just going to ride with whatever my ass and wrists can handle.

[–] [email protected] 1 points 1 year ago (1 children)

I think you'd be surprised how low you can get on some setups these days. I ride my gravel tires at 40 PSI (40mm tire) and I weigh 280lbs with a 305 total system weight. Given that you're on a wider tire and I assume, smaller than me I don't think you'd be pinch flatting on 35psi.

[–] [email protected] 1 points 1 year ago

I may start running lower to see how it affects comfort. I know that when I'm below 50 psi, my tires get much louder, even though they are near silent on roads close to 60 psi. Maybe I'm worrying too much about pinch flats 😂