Cool Tech: VYRO's Multi-Segment Gear System 15

This is pretty cool. It's another possible solution to dropping the front derailleur once and for all. The highlight of the VYRO gear system is the four piece segmented chainring. Each of these segments are mounted on top of a tilted pin. The segments are pivoted into the chain line and forced into operation (pause the video at 2:08 to see it in action). Gradually, the rest of the segments are fed into or out of the chain line until the gear is changed completely. This process can happen at any time, even during hard loads, because the chain is always moving in a straight direction. It only takes 1/4 of a turn to start the movement, providing near instant shifts. The whole assembly is sandwiched by inner and outer guide rings that supposedly eliminate the need for a traditional chain guide. For more details or to help support VYRO's idea, cruise over to

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  • paullehrbmx

    8/6/2012 12:08 AM

    the chain in the pictures is on backwards

  • Snfoilhat

    8/4/2012 8:23 PM

    If I understand correctly, the second major stage of the project would be to implement a 7 or more gears system for the rear, where a cassette now typically sits. 7+ cogs concentric and in the same plane?! (or at least functioning in the same plane, if the chain is not going to shift laterally as in a traditional, derailed system). This will be extraordinary!

  • chequamie

    8/4/2012 7:08 PM

    very cool!

  • sledgehammer.skibikes

    8/4/2012 2:34 AM

    right! And it took off yesterday - thanks to everybody who came from here & thnak you very much for publishing this here. Yesterday we had the break through day with many many new supporters. I am now convinced that the financial future is secured. br G

  • Big Bird

    8/3/2012 7:27 PM

    Close. The small ring stays right in line between the guide plates, and the segments of big ring lean into the chain line and take up the chain when you shift.

  • Moosey

    8/3/2012 3:51 PM

    Thats fancy! I really like the idea. I hope this takes off and becomes a big thing.

    I'm still a bit confused by it though, so let me get it strait. Both chainrings move over when you shift gears, so that the chainline doesn't change right? Like the free space in the so when you shift the chaingrings just shift over?

    Looks very efficient. I'm very interested. Good work.

  • Big Bird

    8/3/2012 1:44 PM

    Thank you Joe.

  • jojotherider

    8/3/2012 10:02 AM

    Apologies to Sledgehammer.skibikes. I've edited my comment.

  • Big Bird

    8/3/2012 9:19 AM

    @ jojotherider. That is entirely inappropriate. If this was in the Forums, your comment would have been erased by me.

  • sledgehammer.skibikes

    8/3/2012 8:08 AM

    Hi guys,

    I am the inventor of VYRO. Thanks for the honor. I hope I am welcome heare to add my comments. It has nothing to do with the Suntour principle. At this priciple the segment is only used to be a bridge between the currentn and the dailed gear. At my principle we really switch the segments into the chain line. So the chain stays always in exact the same position which makes it possible to guide it from both sides - the inner and outer. In the video the chain is really jumping because on this prototype we thought we can use a self lasered chain ring segment to run on a 11gear chain. This was obviously a msitake auctually because we were not able to propperly copy the tooth geometry. It runs perfectly round now when we use parts of standard shain rings.
    So there has been for sure no principle like this on the market. I know because we invested a lot into patent research.
    Dirt & Mud - well still a point we need to rpopperly figure aout. But generally we designed the prototypes very "open" so that the dirt will fall out again. I think it will run as long as a usual system will run too. If you apply a pounf of real mud every system will fail.

  • warthog

    8/3/2012 3:28 PM

    Please don't take what I said the wrong way. I meant no disrespect and I'm not suggesting you copied anyone elses idea. People often have very similar ideas that they come about independently, and it is a great idea. To be clear, it was not a Suntour product that I am talking about, it was a product of Browning Arms the gun manufacturer. Browning did later (1990) license a 3 speed system to Suntour, but that's not the one I meant to refer to, I just mixed up which was which. How you describe your system working is pretty much the same as the way the Browning system worked. Google "Browning 2 speed bmx" and you will see what I mean. That being said, your system looks to be far more sophisticted and I honestly wish you the best of luck in devoloping it into a successful product.

  • warthog

    8/3/2012 5:20 AM

    In the mid 1980's, there was a 2 speed BMX system made by Browning Arms (the firearms company) that used the same principal. I seem to recall that Suntour manufactured it for them, pretty sure anyway. The concepts been around since at least the mid-70's.

  • DavidCSheppard

    8/3/2012 4:40 AM

    Incredible concept, but surely the chain rings still wear out and would be pretty expensive to replace? Also looks like mud would clog it up in no time. And the pins that support the ring would be under incredible load during pedaling maybe fail point. Proprietary cranks, bb etc expensive and surely lots heavier than a 200 gram front mech?
    Still kudos for thinking outside the box and coming up with an impressive solution.

  • jojotherider

    8/3/2012 3:02 AM

    looks like a very interesting concept. its almost like applying the derailleur to the chainring instead of the chain.

    it looks like the chain jumps while he's turning the crank? anyone else seeing that?

  • NorCalNomad

    8/3/2012 2:04 AM

    Reason why derailleurs are still around

    Simplest and lightest solution to the problem.

    That being said this looks pretty cool.

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