this post was submitted on 27 Jan 2026
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[–] infinitesunrise@slrpnk.net 8 points 21 hours ago (1 children)

I rode a bike for decades before I ever owned a car, and until recently bike road tires were all designed to run at like 80psi and safely accept up to 100 (These days I run gravel tires at about 55). It took me a while to accept the fact that my car only wants 34.

[–] twix@infosec.pub 4 points 19 hours ago

The fact is that pressure is force per unit of surface. So your car tires are holding in a lot more force than your bike tires, even though the pressure is lower.

[–] mech@feddit.org 6 points 1 day ago (1 children)

The max pressure printed on my tires is 6.5 bar.
The recommended pressure for the car is 4 bar.
I kind of want to know how it would drive at the tires' max pressure.
But I don't own a road, and I'm not going to try it in public traffic.

[–] TwentySeven@lemmy.world 7 points 21 hours ago (1 children)

The ride will be bumpier, and the tires will wear unevenly, but you will get better gas mileage.

[–] mech@feddit.org 6 points 21 hours ago

Also, braking distance will be longer and traction will be worse.

[–] GalacticSushi@lemmy.blahaj.zone 80 points 1 day ago (2 children)
[–] TheSlad@sh.itjust.works 47 points 1 day ago (4 children)

This is somebody's fetish i just know it

[–] Voroxpete@sh.itjust.works 4 points 1 day ago (1 children)

Look up "Testicular saline infusion."

But, you know... Maybe not at work.

[–] TheSlad@sh.itjust.works 6 points 23 hours ago

No thanks, I'm good.

[–] danekrae@lemmy.world 16 points 1 day ago
[–] Jimbo@pawb.social 15 points 1 day ago (1 children)

Woah.. that's a lot of inflation

[–] festnt@sh.itjust.works 3 points 1 day ago* (last edited 1 day ago)

quite litir(e)ally

[–] enbiousenvy@lemmy.blahaj.zone 5 points 1 day ago (1 children)

that car picture can be seen as either thats the bottom or the top side. depending on which, the left right tires could mean in either side.

Though I'm not a car person and have never inspected cars bottom idk how it should look exactly

[–] Duke_Nukem_1990@feddit.org 3 points 1 day ago (1 children)

Car bottoms are just as valid as people bottoms!!

[–] enbiousenvy@lemmy.blahaj.zone 2 points 19 hours ago (2 children)
[–] tgirlschierke@lemmy.blahaj.zone 2 points 11 hours ago

with or without the dragons

[–] Duke_Nukem_1990@feddit.org 2 points 19 hours ago (1 children)
[–] purplemonkeymad@programming.dev 2 points 18 hours ago

Gotta say, those are nice.

[–] Goun@lemmy.ml 36 points 2 days ago (2 children)
[–] Voroxpete@sh.itjust.works 18 points 2 days ago (1 children)
[–] nutbutter@discuss.tchncs.de 18 points 1 day ago (2 children)
[–] WorldsDumbestMan@lemmy.today 1 points 1 day ago (1 children)

I think you lot are confusing some other post? Did someone switch their post?

[–] nutbutter@discuss.tchncs.de 3 points 1 day ago (1 children)

No. High tire pressure will blast the tyres, car go up high, hit Taylor plane, worth it, my honest erection.

[–] WorldsDumbestMan@lemmy.today 2 points 20 hours ago

Sorry, no get joke, get the feeling it's an inside joke

nice erection0

[–] JamieDub86@piefed.social 5 points 1 day ago

You say that like theres a downside.

[–] Sibbo@sopuli.xyz 31 points 2 days ago

Always get your tires up to 100 persint!

[–] scintilla@piefed.zip 11 points 1 day ago (1 children)

I see a lot of these at my job. I refuse to touch them on the off chance draining air from them is what makes them realize they are so overfilled.

[–] WorldsDumbestMan@lemmy.today 1 points 1 day ago

I guess you need to shoot it with an airgun

[–] Micromot@piefed.social 18 points 1 day ago (1 children)

Still weird to see two random people be verified

[–] Cevilia@lemmy.blahaj.zone 15 points 1 day ago

Gotta get those Important Blue Internet Checkmarks™

[–] swelter_spark@reddthat.com 11 points 1 day ago (1 children)

My tire pressure actually looked like this when my car was delivered by Carvana.

[–] Entertainmeonly@lemmy.blahaj.zone 5 points 1 day ago (1 children)

Are you at low elevation? If your car came from high elevation it would have added a few pounds of pressure by the time it got down to you. Not 60 extra lbs obviously haha

[–] ironhydroxide@sh.itjust.works 5 points 1 day ago (1 children)

That's the opposite of how that works.

Tires are a gauge pressure, meaning pressure vs ambient pressure.

14.7 psia (absolute) at sea level. And getting less as you go higher elevation.

12.7psia ambient is ~4000ft elevation 10.7psia ambient is ~8500ft elevation

So if it you start at sea level with 40psig in your tires, when you get to 8500ft elevation and measure the tires you'll be ~44psig.

If you start at 8500ft at 40psig, when you get to sea level they'll be ~36psig.

Haha totally. You are correct.

Like Wonka says, "Switch that. Reverse it."