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Old 04-20-11, 09:58 PM   #1
islandboy
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Roundtail bicycles

Has anyone heard of these? Comments?
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Old 04-20-11, 10:44 PM   #2
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I hadn't heard of them before. Looks like it would work, but also seems unnecessary on a road bike.
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Old 04-21-11, 05:35 AM   #3
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I think part of the idea is to divert road vibration and frame stresses away from the normal seat tube (i.e. and the rider's lower end).
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Old 04-21-11, 10:05 AM   #4
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Looks like yet another soon-to-be-forgotten attempt to "improve" the bicycle. There has been no fundamental improvement to the double-diamond frame design in over 100 years. It's like trying to improve a claw hammer- you can mess with details & materials, but the basic design was perfected about 2,000 years ago.
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Old 04-22-11, 01:45 PM   #5
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I wish them luck and all, but honestly: bicycle frames that used round frame tubes as crude suspension first appeared over a hundred years ago.

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I hadn't heard of them before. Looks like it would work, but also seems unnecessary on a road bike.
Full suspension (that had no weight penalty) would be a wonderful thing for a road bike, but a suspension fork and a shock seatpost can do quite a lot in that regard.

This looks like it would be flexy laterally as well, and undampened suspension tends to "pogo".
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Old 04-22-11, 03:24 PM   #6
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Full suspension, even with no weight penalty, would be terrible on a road bike. Suspension eats watts.
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Old 04-22-11, 05:19 PM   #7
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They say it's equally stiff laterally, but I don't really see why that would be the case.

Regardless, the features they are claiming are improved comfort, not improved performance, which puts it into the "comfort bike" category, not the "road bike" category, so far as selling.

Looks like it would have additional wind drag and reduced seat tube strength as well.
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Old 04-24-11, 12:58 PM   #8
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Quote:
Originally Posted by lz4005 View Post
Full suspension, even with no weight penalty, would be terrible on a road bike. Suspension eats watts.
Careful now. It wasn't that long ago that many people were talking about how dumb shock absorbers on a MTB were...
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Old 04-24-11, 03:39 PM   #9
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looks kinda groovy !
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Old 04-24-11, 08:03 PM   #10
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Interesting idea but i think its just some1 trying to re-engineer something that no1 feels the need to change. prob wont go anywhere.
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Old 04-24-11, 08:33 PM   #11
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The reason I hate suspension with such a passion is that, on every suspension bike I've ridden, I feel like I have less control. I'm all for continuing efforts to improve suspension. A full-suspension loaded touring frame would be awesome if done right. Made of carbon fiber. Also comes with a free pony.
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Old 04-25-11, 11:33 AM   #12
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Full suspension, even with no weight penalty, would be terrible on a road bike. Suspension eats watts.
Minor suspension to reduce rider fatigue makes watts.
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Old 04-25-11, 11:36 AM   #13
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The reason I hate suspension with such a passion is that, on every suspension bike I've ridden, I feel like I have less control. I'm all for continuing efforts to improve suspension. A full-suspension loaded touring frame would be awesome if done right. Made of carbon fiber. Also comes with a free pony.
Generally on a road bike I've found this to be true. However, on a mountain bike having over inflated tires vs slightly under inflated tires (ie basic suspension) makes a huge difference in terms of control. Over inflated you slide around, under inflated (by the right amount) and you'll stick to the ground much better. Being more comfortable without risking pinch flats is something I would love to have on my tandem (road) or road bike.

note: I'm defining properly inflated as what I would set the tire pressure to for hard level even ground.
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Old 04-26-11, 08:00 AM   #14
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I know I once saw a bicycle with "S" shaped chainstays once. The same idea, to absorb vibration, but I think it was much better in design.
Made in England , IIRC?
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Old 04-26-11, 08:04 AM   #15
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I know I once saw a bicycle with "S" shaped chainstays once. The same idea, to absorb vibration, but I think it was much better in design.
Made in England , IIRC?

I found it! here is is a link, it's called a HETCHINS:

http://sheldonbrown.org/hetchins/
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Old 04-26-11, 05:22 PM   #16
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I love it how among the video suggestions there are a few about stuff that failed due to metal fatigue. Exactly what I was thinking about!
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Old 05-10-11, 08:45 PM   #17
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This is the greatest revolution in bicycle design since the Softride! Oh wait, whatever happened to that company?
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