• Hildegarde@lemmy.world
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    5 months ago

    Imagine designing a bicycle without triangles. Every joint needs to be overbuilt, because there’s no structure from the geometry. But you make sure it still has a top tube, so its just as hard to mount and dismount as a normal bike. Incredible!

    • Kecessa@sh.itjust.works
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      5 months ago

      Right? Who would be crazy enough to do that?

      Next you’re going to tell me someone will make one without a top tube?

      • dejected_warp_core@lemmy.world
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        5 months ago

        Hey, look here buddy. You can’t be your own comment thread and post all the plausible responses yourself like that. You’re putting all the trolls out of work.

      • pyre@lemmy.world
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        5 months ago

        doesn’t that prove their point? they all look overbuilt, as the original commenter said.

        • Kecessa@sh.itjust.works
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          5 months ago

          Carbon fiber, aerodynamics…

          For this one it’s used as suspension (not carbon fiber)

          Not that rare in old mountain bikes either, pretty sure my old steel Raleigh was similar

      • Hildegarde@lemmy.world
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        5 months ago

        The meme shows only bikes with flat handlebars, like commuter bikes intended for transportation.

        Every bike you posted are high performance racing bikes with specialized aerodynamic handlebars.

        Different priorities. Triangless bikes with a top bar is not a good idea for commuter bicicles like the ones in the meme.

        • Kecessa@sh.itjust.works
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          5 months ago

          I still showed that it’s perfectly possible to build a bike without a seat tube, hell I’m sure we can find 90s examples that weren’t high performance bikes.

      • bcron@lemmy.world
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        5 months ago

        Compliance but this is a very very extreme example - you’d hit a bump and the top tube would flex, kinda like a diving board, and smooth out the harshness. I’m not even sure this bike exists but that would be the practical purpose of such a design, but most manufacturers tend to go after the seat stays (Salsa Warbird, Bianchi with Counterveil, Moots Routt YBB) or decouple the seat tube from the top tube and allow it to flex due to seat tube angle (Trek Isospeed). Carbon’s kinda fickle and engineers are constantly trying to figure out how to finesse it into feeling less jarring and rigid

        • Wogi@lemmy.world
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          5 months ago

          This bike does not exist. This is part of a series of theoretical renders from what must be 15 to 20 years ago. When carbon fiber was kind of a new material to the general consumer. The premise was they could not only reduce the weight of the material but because carbon fiber was this space age super material that could melt your tits off if you looked at it sideways, that they could also reduce the need for structural materials like spokes and triangles. Making a featherweight racing bike. Most of the designs had absolutely no way to steer them.

          • bcron@lemmy.world
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            5 months ago

            I was gonna say, the frame just looks a little too outlandish, totally ignoring the wheels and headset.

            Once in a while a bike comes along trying to reinvent the triangle but none are particularly good, often worse than tried and true. Superstrata Classic is a perfect example. Making a 2 triangle frame and adding just a hair of compliance around less-critical spots seems to be the winning formula

    • XEAL@lemm.ee
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      5 months ago

      Nah, but that tube is a little lowered, enough to make a difference.

  • Nougat@fedia.io
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    5 months ago

    I wonder how many revolutions the wheels will do before they bend into pretzels.

  • EmperorHenry@discuss.tchncs.de
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    5 months ago

    That looks like it would be extremely unreliable and needlessly expensive to maintain. Maybe even impossible for the average person to maintain it

      • Aganim@lemmy.world
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        5 months ago

        Yup, that went well for Van Moof owners in the Netherlands. Also hipster bikes, the latest model turned out to be of dubious quality and was built using all custom parts. They had fun times getting their ridiculously overpriced bikes repaired after the company went belly up.

        • Obi@sopuli.xyz
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          5 months ago

          The whole van moof thing was absolutely hilarious tbh (if you didn’t buy one, I mean).

        • uis@lemm.ee
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          5 months ago

          I hope Netherlands will litigate good Right to Repair into existance. Netherlands is part of EU, so I belive in you.

    • BruceTwarzen@lemm.ee
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      5 months ago

      It’s so shit. There is a kickstarter of an ebike like that and it’s worse than you van ever imagine. It’s LOUD as fuck and worse in every way than a normal bike.

      • Etterra@lemmy.world
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        5 months ago

        That’s because it’s not a bike. It’s a sales pitch to silicon valley. Like most tech startups, they want some rich VC dipshit or big tech company to throw millions of dollars at them.

      • uis@lemm.ee
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        5 months ago

        Is it high-bitched electric buzz? If so, then it’s probably BLDC controller. Normal people use PMSM - more efficient and quieter.

  • Etterra@lemmy.world
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    5 months ago

    Company: how can we convince out of shape tech bros to spend $10k on a bicycle?

  • anar@lemmy.ml
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    5 months ago

    Eh, I’m waiting until the seat is simply hovering in the air without any bars

  • AirDevil@lemmy.world
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    5 months ago

    This is the first step to having magnetic wheels become a thing. We know canonically Jim Kirk’s motorcycle uses these, so it’s definitely mainstream by ~2250.

    Honorable mention: the Bell Riots happen September this year, and it seems we’re on track for those too

    • pearsaltchocolatebar@discuss.online
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      5 months ago

      The technology is getting there. I forget which company did it, but one has developed an insane magnetic suspension system for automobiles.

      Right now the limiting factor is the energy required, so battery tech is the bottleneck.

      It’s a real shame shipstones haven’t been figured out yet.

      • Death_Equity@lemmy.world
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        5 months ago

        It was Bose. Yes, the premium sound system producers. It never went anywhere, despite being practical magic, because it added around 2,000lbs and cost six figures.

        They also developed a semi-tractor seat using the same sort of voodoo, which is on the aftermarket for around $5k installed.

      • TheTetrapod@lemmy.world
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        5 months ago

        For a heavily constrained system like a car’s shock absorbers, couldn’t permanent magnets be used instead of electromagnets?

        • Hacksaw@lemmy.ca
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          5 months ago

          I think the main advantage to fixed stiffness springs was that it was controllable. So if it was a fixed strength magnet the advantages over springs is likely limited compared to the cost. Magnetic suspension is cool because it’s an active suspension system.

    • edric@lemm.ee
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      5 months ago

      Would it be hard to translate brushless motors into bikes/vehicles? Don’t those things use magnetism?

  • Fandangalo@lemmy.world
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    5 months ago

    As far as I can tell, this product never panned out. It was backed by 132 people to cover 150k GBP in 2017. It was called the “Cyclotron Bike”.

  • Emerald@lemmy.world
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    5 months ago

    i never realized until this moment that the meme showed them putting a stick in the wheels. i always thought they just happened to fall off.

  • cordlesslamp@lemmy.today
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    5 months ago

    Me on that bike: ah, muddy dirt road, my arc nemesis. And what’s that? a random pile of dog poop, my day’s ruiner.

    • nifty@lemmy.world
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      5 months ago

      Not exactly dumbing down, I guess removing components which are redundant after redesigns

      • DarkThoughts@fedia.io
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        5 months ago

        Highly depends on the use case. I doubt this type of construction would work with mountain bikes (or at all, honestly, since the design for this is very old by now and it clearly never went anywhere).

    • hypeerror@sh.itjust.works
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      5 months ago

      Fork aside, a bike wheel’s structure is based on supporting the load on the hub by hanging from the spokes at the top of the wheel. In order for that machine’s wheels to not fold in half the rim would have to be incredibly heavy and slow.

    • barsoap@lemm.ee
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      5 months ago

      Never mind how strong the thing itself is, that joint is basically impossible to engineer so that the wheel can’t rotate side to side. That is, rotate on an axis it’s not supposed to. Sure, you can prevent an (essentially) round thing from rotating with a pipe clamp, but now try to do that while allowing freedom lengthwise.

      That wheels are round and not pipes help a bit, there’s some lever purchase you get from the radius but in general, nope. You’re still sitting at the short end of the lever.

      Diamond frames with spoked wheels are literally the optimal solution to the problem the rest is compromise (e.g. having no top bar for comfort) or overengineering.

  • Fedizen@lemmy.world
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    5 months ago

    You could also cover the spokes or use a spokeless single wall design. I do think a design like this would need to be cleaned a lot.