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Sakae "RoundTech"

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Old 02-02-13, 05:05 PM
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frantik
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Sakae "RoundTech"

Was the whole "roundtech" thing, with the decals on the chainrings and whatnot a response to Shimano's Biopace?

It's kinda funny to see a company hyping the roundness of their rings

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Old 02-02-13, 08:18 PM
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As you say, it was SR's version of biopace, apparently some riders prefer it. The rings are round, but not necessarily circular.
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Old 02-02-13, 09:35 PM
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Originally Posted by rhm
As you say, it was SR's version of biopace, apparently some riders prefer it. The rings are round, but not necessarily circular.
Ummm, IIRC the "Round-Tech" rings are quite circular. Again IIRC, the name was a not-so-subtle jab at Biopace.

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Old 02-02-13, 09:36 PM
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So that's different than SR's Ovaltech?

I had a set of Ovaltech rings on a late 80s Trek that I had for a short while. I really liked them.
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Old 02-02-13, 10:22 PM
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i thought i remembered "ovaltech".. i suppose roundtech was to ensure people knew they were indeed round

I'm rocking one on my Alpina.. it looks and feels pretty darn round

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Old 02-02-13, 10:27 PM
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Originally Posted by bobbycorno
Ummm, IIRC the "Round-Tech" rings are quite circular. Again IIRC, the name was a not-so-subtle jab at Biopace.

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It made me laugh out loud
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Old 02-02-13, 11:54 PM
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Originally Posted by bobbycorno
Ummm, IIRC the "Round-Tech" rings are quite circular. Again IIRC, the name was a not-so-subtle jab at Biopace.
Absolutely correct. In the mid/late '80's, Shimano insisted that everyone and their Uncle Joe convert to non-round rings, since, y'know, we can prove they're better. After a year or two, they came out with "Biopace II", which was less eccentric. By the early '90's Biopace was dead.

When I was at Euro-Asia Imports, we would swap round SR rings on Shimano cranksets as a service to our customers. I'm pretty sure we did it just for the difference in cost of the rings. I know that there's still a bunch of boxes of Shimano Biopace chainrings sitting there. They'll probably be unearthed thousands or years from now, and the archeologist will say "what were they thinking?"...
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Old 02-03-13, 11:47 AM
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Kind of reminds me of the "Oliver's yes tubes" system.
https://petefagerlin.com/yes_tubes/index.htm
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Old 02-03-13, 01:23 PM
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Originally Posted by bobbycorno
Ummm, IIRC the "Round-Tech" rings are quite circular. Again IIRC, the name was a not-so-subtle jab at Biopace.

SP
OC, OR
Doh!

Yes, I was thinking of Ovaltech.

Still, I question the idea that an oval, or even a weird non-elipse like Biotech, isn't 'round.' They're all round.
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