Print Your Mind: “The Infinity” - A Bike Design by Stephan Henrich

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  • Опубліковано 1 сер 2024
  • The Sintratec technology turns the wildest concepts into a tangible reality - such like this model of a beach and city cruiser with an all-wheel drive. Check out Stephan Henrich's latest project, a fully 3D printed sneaker! 👉 • "The Cryptide Sneaker"...
    Chapters:
    0:00 Intro
    0:07 Stephan Henrich about "The Infinity"
    0:16 The idea behind the design
    0:40 Is it possible to be manufactured?
    1:04 Outro
    #PrintYourMind
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    About us: Sintratec is the leading Swiss provider of first-class selective laser sintering (SLS) solutions. The professional 3D printing systems and resilient materials meet the highest industrial requirements. From the consultation to the service - Sintratec offers a user-friendly and overall package for modern, scalable additive manufacturing. To realize your ideas and designs in a fast and cost-effective way.
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  • Наука та технологія

КОМЕНТАРІ • 221

  • @Sintratec
    @Sintratec  4 роки тому +7

    Check out Stephan Henrich's latest project, a fully 3D printed sneaker! 🤩👉ua-cam.com/video/pqaWg85WgUE/v-deo.html

    • @harilalmn
      @harilalmn 2 роки тому

      Ho to turn it?

    • @chequespiriensansprovision8689
      @chequespiriensansprovision8689 2 роки тому

      Et ça tourne comment? Avec la force des jedi? Pfff quelle indignité

    • @indkartallc9900
      @indkartallc9900 2 роки тому +1

      What printer was used to print this shoe? SLA ?

    • @Sintratec
      @Sintratec  2 роки тому

      @@indkartallc9900 It was printed on our Sintratec S2 SLS printer (Selective Laser Sintering) with PA12 Nylon.

  • @chuckmaster
    @chuckmaster 2 роки тому +177

    Designer: "I never found any killer argument to prevent it from going further"
    Literally everyone: you can't steer it.

    • @StephenCoorlas
      @StephenCoorlas 2 роки тому +5

      Ha, exactly. Not without losing a ton of energy and momentum to friction…

    • @DorianLust
      @DorianLust 2 роки тому +6

      Looks like it just flexes the belt sideways.

    • @kevinclark9176
      @kevinclark9176 2 роки тому +1

      This was exactly my first thought. You can’t turn.

    • @Dan0948
      @Dan0948 2 роки тому

      That was the first thing I noticed looking at this design, is how in the heck does it turn?

    • @reesamarteifio6809
      @reesamarteifio6809 2 роки тому +3

      And without steering, you won't be able to keep balance, so you'll fall after a few seconds

  • @sansabh
    @sansabh 2 роки тому +78

    Lack of steering totally limits this to wide curves on proper paving. It's conceptually beautiful, but very niche. That said, I'd love to try it! ❤️

    • @Dan0948
      @Dan0948 2 роки тому +5

      That was my first observation, how in the heck does this thing turn?

    • @Zachary-
      @Zachary- 2 роки тому +2

      It looks like it'd steer the same as a motorcycle. Those turn just fine.

    • @richardvalitalo3670
      @richardvalitalo3670 2 роки тому +7

      Countersteering required to stay upright! Also dirt in th belt would destroy it.

    • @mmb8790
      @mmb8790 2 роки тому +3

      What if you have 2 infinity wheels?

    • @ands1983
      @ands1983 2 роки тому +3

      YES! Thank you- the person that designed this has never ridden a bike.

  • @danmartinrc
    @danmartinrc 2 роки тому +60

    Bicycles are super efficient designs that are hard to improve on. There are not many products you can use today that have been refined over 200 years of consumer use. Biking on surfaces where you don't have enough grip for 1 wheel drive is usually not a good idea.
    Adding a lot of friction, loss of steering, weight, manufacturing complexity, and cost just to increase grip is probably not going to see commercial success. There have been many attempts at 2WD bikes before, some actually making it to the market, but the problem is there's no acutal need for it.

    • @jacksonchan6822
      @jacksonchan6822 2 роки тому +4

      Oh yeah? Then how do you explain square wheels!??

    • @kajunklown
      @kajunklown 2 роки тому +2

      @@jacksonchan6822 drunk carpenter?

    • @kajunklown
      @kajunklown 2 роки тому +2

      A 2wd bicycle is very easy to do in this day and age. Take a rear wheel drive electric bike, add a front wheel electric rim hub, get a big ole battery and watch a how-to video on the You Tubes to figure out how to wire it all up. About 1500 for a decent drive train and 800 to a 1,000 for a good battery... And as far as having a need for it would depend on the terrain and environment you are in.

    • @micahwhite7484
      @micahwhite7484 2 роки тому

      @@jacksonchan6822 Canadians. That's how. LoL

    • @micahwhite7484
      @micahwhite7484 2 роки тому +2

      @@kajunklown Exactly. We can already upgrade a basic bicycle to 2WD AND get the added benefit of electric assist using off-the-shelf parts.

  • @DorianLust
    @DorianLust 2 роки тому +24

    I think it might technically work, but the friction will likely be too much to be a practical design. Looks cool.

    • @gomesed2
      @gomesed2 2 роки тому

      Excited to run on a single tire until I get a puncture.

  • @richiesworld1
    @richiesworld1 2 роки тому +3

    Would love to see this come to fruition. I don't really care about the efficiency issues or the flex steering, or the apparent need for some kind of differential 🤷🏿‍♂️...Just Do It!

  • @lnhome
    @lnhome 2 роки тому +23

    The basic problem of this "all wheel drive" bicycle is the "all wheel drive".
    When cornering a normal bicycle's front wheel spins more than the rear wheel because of its larger turning radius.
    If you could steer this bike then how would the front wheel turn more than the rear wheel? The "all wheel drive" wouldn't allow it.

    • @dabhaiya4723
      @dabhaiya4723 2 роки тому +4

      That's...actually really smart

    • @MarcoVenustus
      @MarcoVenustus 2 роки тому +6

      Not without losing a lot of energy on friction and rubber deformation.

    • @thfreakinacage
      @thfreakinacage 2 роки тому +11

      The guy who designed this really needs to look at why every fuel driven vehicle for the past 200 years has had a differential :P

    • @DorianLust
      @DorianLust 2 роки тому +2

      Good point, he'll need crab steering to flex it in the middle instead of ahead of center, but that might make balance hard. As is it has no rake angle, but it's not a wheel so maybe it doesn't need it.

    • @m64h
      @m64h 2 роки тому +3

      Exactly. This is basically a unicycle, stretched out to the shape of a figure eight

  • @praveng
    @praveng 2 роки тому +2

    What would be turning radius??
    How does the infinite tyre handle turning ??

  • @dnyboy209
    @dnyboy209 2 роки тому +6

    This might work in some dystopia future where we have long tracks of perfectly straight bike lanes and you just get off the bike at your stop and someone else who needs to keep going forward will take it over and so on. Just no turning.

    • @longebane
      @longebane 2 роки тому +1

      This is absurdly complex for that straight bike lane scenario

  • @rodneysmart9774
    @rodneysmart9774 2 роки тому +6

    I have a design that's far less efficient and far more costly than existing technology.
    I've been working on it for years.

  • @777fiddlekrazy
    @777fiddlekrazy 4 роки тому +12

    to turn:
    ****LIFT FRONT WHEEL FROM DRIVE SURFACE BY WEIGHT SHIFTING TO THE REAR AND ABRUPT PULLING UP OF HANDLE BARS WHILST LEANING TOWARD YOUR TURN DIRECTION****
    Y'ALL MISSED A BASIC SUMTHIN'!

    • @hamzterix
      @hamzterix 2 роки тому

      bUt I LoOk cOol

    • @longebane
      @longebane 2 роки тому

      IT'S LIKE A MANUAL ON A SKATEBOARD BRO, EZ

    • @hamzterix
      @hamzterix 2 роки тому

      @@longebane easy

  • @JumpingTuna
    @JumpingTuna 2 роки тому +9

    You wouldn't be able to steer it effectively at lower speeds, and steering it at higher speeds would be much more difficult. Also, the gyroscopic precession that normal bikes rely on to remain stable during wouldn't happen with that design.

  • @JonathanWayneAndress
    @JonathanWayneAndress 2 роки тому +3

    I'm actually blown away by how negative and eager people are in the comments to shut this idea down. Innovation is often met with resistance and criticism. So in that thinking this could be an incredible idea. Lol Even if it's flawed, some times having non practical ideas can inspire the practical ones. I love the design I hope to see it in full size or even print it myself one day. Stay inspred and keep working on this project! No matter the outcome it's inspirational and may drive other ideas that improve our world in many different ways. Cheers!

    • @Sintratec
      @Sintratec  2 роки тому +1

      Thanks for your insightful comment Jonathan!

  • @alexwaft
    @alexwaft 4 роки тому +23

    any dirt will destroy the belt. Now I understand why it's called "city cruiser" -- bcause you guys have clean cities there, ha-ha :)

    • @MyAcer20
      @MyAcer20 2 роки тому

      Yea but the country its from the city's are actually clean unlike us city's im more concerned about turning to make a corner even the animation does not show that

  • @GudieveNing
    @GudieveNing 2 роки тому +8

    I'll get straight to the point: The Romans would have loved this. And it would be great in Holland too, in particular on their long straight dikes. Really innovative though. Looking forward to version 2.0, with a twisty centre section with some form of differential to allow for riding on non Roman roads...

  • @MarcoVenustus
    @MarcoVenustus 2 роки тому +4

    So what is the benefit over a normal bike?

    • @chmchn
      @chmchn 2 роки тому

      Super Benefit: if you ever find yourself in a situation where you need to make a sudden stop, a sick flip is pretty much guaranteed

  • @machfiver753
    @machfiver753 2 роки тому +4

    Pretty sure that the wipeout when you eventually throw your mono track off the rim will require a hospital visit for sure.

  • @Gigaloader
    @Gigaloader 2 роки тому +1

    It's like a tank chain on a bike. Not exactly sure what is revolutionary here, but it looks cool.

  • @thfreakinacage
    @thfreakinacage 2 роки тому +10

    So the design is super cool, I won't deny that. Would look great in a Sci-fi movie, but there's too many reasons they won't work in reality.

    • @yashnanda3427
      @yashnanda3427 2 роки тому

      It could work, either way it would good for science..

    • @longebane
      @longebane 2 роки тому +4

      @@yashnanda3427 science.. Of what?

    • @userunknown9947
      @userunknown9947 2 роки тому +4

      @@longebane science of not being able to steer lol

  • @Danneskjold_Ragn
    @Danneskjold_Ragn 2 роки тому +1

    This bike should go to Mars inside the Vulvaspaceship! Great achievements of mankind!

  • @-paulmp
    @-paulmp 2 роки тому +3

    First up, it looks super, super cool and I do want to try riding one... but there are a few immediate issues that I can see. Yes there is the issue of steering that everyone has pointed out, but there is also the issue of bicycle and motorbike wheels moving at different speeds when cornering / turning / going over bumpy surfaces (or jumps). The 1 continuous "wheel" means that you've got a locked system. I can't see a good use case for this... but I still want one to try :)

    • @Sintratec
      @Sintratec  2 роки тому

      Thanks for your constructive comment Paul - the concept definitely needs further improvement.

    • @KevinSatterthwaite
      @KevinSatterthwaite 2 роки тому

      if you look closely between the drive pedals and the front suspension youll see and upper and lower steering pivots. i hove no idea about the intended degree of steering angle. but it appears there is some. Im much more curious about the gyro properties that keep a normal bicycle upright.

  • @andrewbeattieRAB
    @andrewbeattieRAB 2 роки тому +2

    Incredibly interesting design! I think the steering “opportunity” could be solved. The question is weight/rider strength and cost.
    If you don’t like my comment, don’t bother me with your “yeah but…, yeah but,….” Your criticisms of another’s creative design are an important.

    • @Sintratec
      @Sintratec  2 роки тому

      Thank you for the kind words Andrew

  • @chillilover8345
    @chillilover8345 2 роки тому +2

    Cool design, but when you said I haven't found any killer arguement that would disprove the design. I have one,, how to you turn? Haha

  • @samt.1369
    @samt.1369 2 роки тому

    I love Stephen Henrich design. You should check his latest work: The squared wheels, perfect for climbing stairs

  • @jack50806
    @jack50806 4 роки тому +3

    What about friction?
    Without Bearing how to solve that problem?

  • @Stry-Glitch
    @Stry-Glitch 2 роки тому

    When i asked for a light cycle from Tron, I did not expected that !

  • @williamnagel2654
    @williamnagel2654 2 роки тому +2

    How does it turn?

  • @chrisjhart
    @chrisjhart 2 роки тому +3

    A flat tyre would mean taking the entire thing to pieces over a period of weeks.

  • @anindanahiyan8660
    @anindanahiyan8660 2 роки тому +1

    this requires the "wheel" to be under constantly changing directions of stress and friction, so this would practically be extremely inefficient and not very durable, since stress-hardening will very quickly change the elastic properties of whatever you use for the wheel.

  • @jameslanclos568
    @jameslanclos568 2 роки тому +1

    What’s the turning radius 🦴???

  • @Spacefish007
    @Spacefish007 2 роки тому

    it's a cool concept and would be doable IMHO, but there are many downsides.
    - a lot of friction
    - a lot of bending of the flexible tire which needs energy
    - flexible tire needs to be solid, otherwise it won't bend "inwards"
    - dirt gets into the mechanism as the rollers touch the driving surface of the wheel
    - steering can be hard to archive as it introduces a "side bend" axis to the flexible tire
    - tire needs to be flexible in all "bend" axis but should be absolutely resistant to stretching or compression -> need some sort of ball Ingerlinks between the teeth
    - energy I applied at the worst possible position on the flexible tire.

  • @AnalisandoSampa
    @AnalisandoSampa 2 роки тому

    Many have already mentioned the issue about the steering. How do you steer in this bike?

  • @davidfrete1824
    @davidfrete1824 2 роки тому

    Y como giras? Me gusta la idea y el diseño q tiene. Pero como haces para girar hacia los costados en una esq cerrada?

  • @3rcki2xl72
    @3rcki2xl72 2 роки тому +1

    Whats about cornering? Meaning both whelpasses on ground.

  • @Rusty-Doggo
    @Rusty-Doggo 2 роки тому +1

    As cool as it looks I got to ask. How do you turn with that thing?

  • @dwood2342
    @dwood2342 2 роки тому +3

    Instructions:
    -Warning: Only ride on dry pavement.
    -Use your toothbrush to clean between each belt "tooth" after each ride.
    - If applicable, use provided jockstrap to keep a necessary items out of belt teeth.
    -Enjoy.

  • @wardogdauwdd3020
    @wardogdauwdd3020 2 роки тому +1

    If I had money I totally support it and also do you know any way I can get my hands on the concept art and research on it and try to make a working to scale prototype somehow

  • @delovarana3394
    @delovarana3394 4 роки тому +6

    How to turn?

    • @harilalmn
      @harilalmn 2 роки тому +1

      Yes... Thats what I too thought...!

    • @davidperry8304
      @davidperry8304 2 роки тому +5

      You don't turn. It is only for going in a dead straight line!

  • @exiledrabbit
    @exiledrabbit 2 роки тому +1

    How does steering worl

  • @soerenraudonis
    @soerenraudonis 2 роки тому

    Was ist mit Physik? die Reibung und der Wiederstand aufgrund der der Verengung im Umlauf sollte um einiges höher sein als bei einem ( oder sogar zwei ) Rädern die parallel verbunden sind. Aber vom optischen ein tolles Konzept, zugegeben

  • @McDonaldsCalifornia
    @McDonaldsCalifornia 2 роки тому +4

    Why do designers keep trying to literally reinvent the wheel?

    • @thfreakinacage
      @thfreakinacage 2 роки тому +1

      Funny how they all fail too 🤔 Haha!

  • @AdamPanek
    @AdamPanek 2 роки тому

    How do you turn?

  • @ADRIANMOYANO220
    @ADRIANMOYANO220 2 роки тому

    Y como se realizan las maniobras con ese diseño????

  • @Dmitrii31105
    @Dmitrii31105 2 роки тому

    Круто, я бы на таком прокатнулся.

  • @fernaoverde
    @fernaoverde 2 роки тому +1

    How do you steer this bike?

  • @9some
    @9some Рік тому

    how do you turn?

  • @joshuacarey9367
    @joshuacarey9367 2 роки тому +1

    This is an interesting concept bike but far from a peek into the future. Think of the torque would it to push all that forward. How would you stop going down hill at high speeds the singlar gear would blow your knees out 😆. Keep pushing, you'll get there.

    • @user-gn8xy4ci1i
      @user-gn8xy4ci1i 2 роки тому +1

      You don't need engineering background to know this is a failure. Any kind of spare part is not going to be easy to find.

  • @icedova
    @icedova 2 роки тому

    So that's one continuous tire how do you turn

  • @RickeyBowers
    @RickeyBowers Рік тому

    The faster the wheel moves, the greater the force on concave center -- the single wheel wants to be circular.

  • @slabua
    @slabua 2 роки тому +1

    How do you steer it?🤔

  • @teejg49
    @teejg49 2 роки тому +1

    Seriously? You haven't come across any killer arguments why this concept bicycle will not get past the novelty model you have in your hand. That's so funny. Here's three... Steering friction and cost. That being said it's a wonderful piece of conceptual art.

  • @fabderaouf
    @fabderaouf 2 роки тому

    كيف سيتم الدوران الى اليمين او اليسار دون ان تفقد عزم الحركة المطلوب !؟

  • @all4espi
    @all4espi 2 роки тому +7

    It looks super cool, but what can it do that any existing bicycle design doesn't do already, and almost positively better. After all, that's the point of engineering and design, not to make things more complex, but rather the opposite: to make things simpler, more reliable, easier to maintain, easier to manufacture, easier to repair, and lower cost in materials, etc. This design doesn't appear to meet ANY of those criteria.
    Again, it looks cool, would be awesome, and I would love to see actually built, just to see it in action alone. It's a piece of art, really.

    • @scottbradentx
      @scottbradentx 2 роки тому +2

      yeah its a fun design exercise but agree, show me the use case.

    • @micahwhite7484
      @micahwhite7484 2 роки тому +1

      "Making the complex simple, that's creativity" Charles Mingus

  • @tazmania4513
    @tazmania4513 2 роки тому

    Interesting concept... What about rain? 🤔

  • @paulsingh9354
    @paulsingh9354 2 роки тому +1

    Looks tight though. Like Tron-esque.

  • @squidelleotious6362
    @squidelleotious6362 2 роки тому +1

    One issue with that design, how would we steer the bike?

  • @Sciguy95
    @Sciguy95 2 роки тому +2

    Beautiful design, but I have my doubts. Especially about steering, I'd love to see an actually functional build to prove the concept.

  • @xhappymasksalesmenx4092
    @xhappymasksalesmenx4092 2 роки тому

    How do you turn. And I don’t mean leaning

  • @khetheloshabangu8291
    @khetheloshabangu8291 2 роки тому

    How do you change a flat 🤔

  • @KyleSand
    @KyleSand 2 роки тому +2

    Whats the inertia like on an infinity wheel? Circles are awesome for inertia and helps keep the rider upright

  • @maxbrt1336
    @maxbrt1336 2 роки тому

    Très jolie très bonne conception mais avec un seul et même pneu j'aimerais savoir comment c'est vous pour bloquer seulement le frein avant ou le frein arriere

    • @maxbrt1336
      @maxbrt1336 2 роки тому

      C'est un projet purement esthétique

  • @Caseylawton
    @Caseylawton 2 роки тому +1

    Ummm how do you steer it?

  • @DominicRyanOsborne
    @DominicRyanOsborne 2 роки тому +1

    No flywheel or gearing system?

  • @OVERLOARD949494
    @OVERLOARD949494 2 роки тому +1

    Warhammer fans: "The Chaos Bike"

  • @tonysavage-9119
    @tonysavage-9119 2 роки тому

    My cousin Ruben has one of those

  • @Jamil1989
    @Jamil1989 2 роки тому +2

    Turning?

  • @spalyas
    @spalyas 2 роки тому

    How the heck you turn the thing.

  • @rebaixagyn484
    @rebaixagyn484 2 роки тому

    Só queria saber como faz pra virar

  • @user-uzaet
    @user-uzaet 2 роки тому

    Круто!

  • @wmrustycox
    @wmrustycox 2 роки тому

    Might be great... in a straight line. The limited steering could present an issue.

  • @79pacman
    @79pacman 2 роки тому

    Why have 2 brake leavers on it

  • @cruzcortez2772
    @cruzcortez2772 2 роки тому

    That bike was invented by chicanos long time ago !!!! Looks like a Low rider bike to me!!! Con on now!!!

  • @r0ll1ng3r
    @r0ll1ng3r 2 роки тому +1

    Changing the tire could be cost a lot of time!

  • @j.b7027
    @j.b7027 2 роки тому

    Como giras?

  • @VanceBarbour
    @VanceBarbour 2 роки тому +1

    What about making turns?

  • @paulsingh9354
    @paulsingh9354 2 роки тому

    Could you imagine changing the tire?

  • @NicksStuff
    @NicksStuff 2 роки тому

    "I never found any killer argument to prevent it from going further"

  • @myperspective5091
    @myperspective5091 2 роки тому +2

    👍🏆👍

  • @huijsg1
    @huijsg1 2 роки тому +1

    Muy ingeniosa; sin embargo deberá ser muy complicado girar el manubrio...

  • @BerkayCamgoz
    @BerkayCamgoz 4 роки тому +2

    Is there free STL file?

    • @Sintratec
      @Sintratec  4 роки тому

      unfortunately no, Stephan Henrich has not made the file publicly available.

  • @dylanresciniti7495
    @dylanresciniti7495 2 роки тому

    ... But how does it turn?

  • @davidcotter1274
    @davidcotter1274 2 роки тому

    Howard Moon?

  • @tafadzwamapamula
    @tafadzwamapamula 2 роки тому +6

    This has to be joke or the designer is doing this just to raise a bit of money or publicity. Next he will be redesigning spoons.

  • @quinten1231
    @quinten1231 2 роки тому

    My first thought seeing this was what a shitfest it must be when you happen to drive through some dog shit. It would be everywhere

  • @rayserx98
    @rayserx98 2 роки тому

    y como carajo doblo esa cosa? creo q se olvido de eso

  • @davidkline4372
    @davidkline4372 2 роки тому +1

    Say hello to the bike-tank concept. Looks simple to manufacture and steer... /Sarcasm I imagine this handles as well as a tank too. Looks interesting but not practical.
    What principle or concept already in the bike industry is this design improving on? I don't see it.

  • @Andrecio64
    @Andrecio64 Рік тому

    The bike where you can only go forward.
    F*CKING ROASTED 👌

  • @hermask815
    @hermask815 Рік тому +1

    if there is no killer argument against it....
    where is the working prototype video to shut up all critics?

    • @Sintratec
      @Sintratec  Рік тому

      I think it's mostly a matter of time & cost - someone would have to fund that project as Stephan says in the video

  • @VIRTU_Anchor
    @VIRTU_Anchor 2 роки тому

    The epitome of over-engineered

  • @allthingstoallmen8912
    @allthingstoallmen8912 2 роки тому +1

    Seeing a lot of comments shooting this thing down, instead of trying to find a solution for the steering issue. Shame on you

    • @generaldirection5123
      @generaldirection5123 2 роки тому +2

      Why does anybody here have to "find a solution for the steering issue"? Steering has never been an issue on bikes before. This guy took the working concept of a bicycle and ruined it. Not just the steering either, he ruined practically everything else you can on a bike too: friction, suspension, ease of maintenance, safety (cost probably). This is more art piece than transportation.
      Actually no, scratch that. This is artwork, nothing more. You can't even compare it to a real bicycle, it fails so badly on every level.
      Oh, and BTW: the guy literally invites criticisms in this 1 min video himself. He said, "I haven't heard any killer arguments that invalidate the concept yet." Everyone here is providing those for him. He may actually be a narcissist who completely tunes out valid criticisms, because it's so hard to believe "nobody told him any killer arguments yet".

  • @lopo2904
    @lopo2904 2 роки тому +1

    怎么转弯?

  • @blindcriminal
    @blindcriminal 2 роки тому

    Did this guy had heard about dry friction ?

  • @yashnanda3427
    @yashnanda3427 2 роки тому

    I hope it works

  • @eugeniomarelli9272
    @eugeniomarelli9272 2 роки тому

    Consulta: dobla???
    No parece que pueda doblar...

  • @cacogenicist
    @cacogenicist 2 роки тому

    Uh ... hmmm ... how do you turn?

  • @skateborg
    @skateborg 2 роки тому +2

    Uh-oh. I fell into a yanko design rabbit hole again.

  • @tintumonyt3498
    @tintumonyt3498 2 роки тому

    Problem 1 you cant steer it
    Problem 2 for normal bicycle you have larger sprocket at pedal and smaller sprocket at rear. Here one sprocket need to push bike so more effort to drive

  • @immatureradical
    @immatureradical 2 роки тому

    I love it every time I see cool startup wannabees who set off to "reinvent the bicycle" only to reveal that they have absolutely no idea how a bicycle works

  • @raygee3587
    @raygee3587 2 роки тому

    I hate to change a flat on that thing.

  • @raff2194
    @raff2194 2 роки тому

    Steering? Perhaps...