• passiveaggressivesonar@lemmy.world
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    5 hours ago

    I know this is obvious but it boggles my mind how each square inch of that tire has almost 100lbs of force pushing on it

    Just realizing now why hydraulics are so strong, a 6 inch squared piston at 100 psi is 600 pounds of force

    • absGeekNZ@lemmy.nz
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      29 minutes ago

      I work with industrial hydraulics, the forces involved in big gear are truly insane.

      Working pressures is around 270bar…on ~1.4m^2 of cylinders. Millions of kg of force.

  • Lowpast@lemmy.world
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    12 hours ago

    Why the fuck is the word shit “censored”. What is the point of obfuscating a few pixels yet the word is still visible

    • 9point6@lemmy.world
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      9 hours ago

      I find bar more intuitive even if it’s just hPa/1000

      Nearly 7 bar is impressive for any tyres

      • MentalEdge@sopuli.xyz
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        6 hours ago

        Any car tire.

        For road bicycles 7 bar is just “normal”, 8 and above isn’t unheard of.

        A guy once asked if I was crazy when I was pressurizing my hybrid bike to 6 bar, and I just pointed to the sidewall where the rating said 4.5-6.5 bar. The range is wide because the pressure you should use varies depending on what you weigh, and how you want to balance rolling resistance vs comfort.

        And even then the safety margin on bike tires is more than double the max rating, so it’s perfectly safe to go a full bar over if you want.

      • Thorry84@feddit.nl
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        2 hours ago

        If we take the banana to be 180 grams and the square dishwasher to be 0.36 square meter, that would come to about 140,000 bananas per square dishwasher.

        • Lord Wiggle@lemmy.world
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          38 minutes ago

          Nice math. Makes more sense then imperial, for sure. That’s a lot of bananas, might as well go drive a banana car

          Bloodhound Gang

      • teletext@reddthat.com
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        10 hours ago

        100 psi
        14400 lbf/ft^2 (pounds-force per square foot)
        1600 ozf/in^2 (ounces-force per square inch)
        689.475729 kPa (kilopascals)
        689475.729 Pa (pascals)
        6.80459639 atm (atmospheres) (unit officially deprecated)
        6.89475729 bars
        68.9475729 dbar (decibars)
        6894.75729 mbar (millibars)
        5171.49326 Torr (torr) (unit officially deprecated)
        5171.49252 mmHg (millimeters of mercury)
        203.602068 inHg (inches of mercury)
        70.30696 m WC (meters of water column)
        0.07030696 km WC (kilometers of water column)
        230.6659 ft WC (feet of water column)

        • Kitathalla@lemy.lol
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          7 hours ago

          I didn’t know Torr was deprecated… For some reason that was always the number for STP I could remember in physics.

        • LifeLemons@lemmy.mlOP
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          10 hours ago

          Can you give me a reading in burgers needed to achieve that pressure in my heart?

  • ComradeMiao@lemmy.dbzer0.com
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    15 hours ago

    Once my roommate punctured one of my tires and I went to a gas station and filled it up. Must have been one of my first times doing it ever. As I got back on the highway my car finally showed the pressure, it read 73….

    • IninewCrow@lemmy.ca
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      15 hours ago

      Don’t feel bad … I drove down the road once in my old truck and started feeling a terrible shaking … I drove for a while hoping it would go away but it got worse. I finally pulled over and had a look at front passenger side tire … a bulge was sticking out of it like a giant bruise and once the tire stopped moving, the bulge grew ten sizes and as soon as I realized what it was, I turned away and the thing exploded!

      Always check your tires.

  • Grass@sh.itjust.works
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    14 hours ago

    meanwhile I’m sketched out by the tires on my uncles old road bike that say max 90 psi wheras mine say like 20 or so.

    • Victoria
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      12 hours ago

      narrow tires need more pressure to maintain the same outward force, because the area is smaller.

      • takeda@lemmy.world
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        12 hours ago

        Ok so that’s what the backup tire says 60psi.

        When I first saw it, I thought that it has to be wrong and I’m looking at the wrong number.

        • DesolateMood@lemm.ee
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          10 hours ago

          When I saw it the first time, before I understood how it worked, I thought “surely this is just for long-term storage purposes and I would need to bleed some pressure if I wanted to drive on it”