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Fastback Seat Stays

Old 09-12-15, 08:53 PM
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Anybody got a Ron Cooper? Back in the 80's, that was the prototypical fastback stay.
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Old 09-12-15, 10:03 PM
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Originally Posted by gugie
Anybody got a Ron Cooper? Back in the 80's, that was the prototypical fastback stay.
Fast back seat stays were around long before 1980.

Raleigh Pro's had them in about 1970,... there were many others, too. Post #4 in this thread shows that design.


Post #18 shows a version from 1917.


Last edited by Bad Lag; 09-12-15 at 10:07 PM.
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Old 09-12-15, 11:15 PM
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Originally Posted by Bad Lag


Fast back seat stays were around long before 1980.

Raleigh Pro's had them in about 1970,... there were many others, too. Post #4 in this thread shows that design.


Post #18 shows a version from 1917.
Yeah, but in the 80's, Ron Cooper was the example to be followed.
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Old 09-13-15, 05:07 AM
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Wow! That's one nica bici! Lug work is out standing!
Originally Posted by callig
A Condor Superbe Fast back stay


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Old 09-13-15, 05:50 AM
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Vanilla sweet

[IMG]Vanilla 11 by Mark, on Flickr[/IMG]

[IMG]Vanilla 21 by Mark, on Flickr[/IMG]
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Old 09-13-15, 05:55 AM
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Whenever I see this bike, I wonder why I don't have one yet.

Originally Posted by poprad
Vanilla sweet

[IMG]Vanilla 11 by Mark, on Flickr[/IMG]

[IMG]Vanilla 21 by Mark, on Flickr[/IMG]
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Old 09-13-15, 06:10 AM
  #57  
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Originally Posted by noglider
I don't have a picture of my 1975 Viscount's seat cluster, but it also has this feature.
Here is mine.

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Old 09-13-15, 06:40 AM
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Thanks GoMango, it is the finest steed in the stable. I've upgraded recently to the new TRP HYRD cable actuated hydraulic disc brakes, now the brakes match the rest in quality and function. These units are a really cool upgrade, and a mechanic's best friend. No bleeding lines!

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]

Last edited by poprad; 09-13-15 at 06:46 AM.
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Old 09-13-15, 06:58 AM
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That's a beautiful bike Poprad...we have the same vintage. Yours is fancier than mine. The ligs remind me a little of more intricate Galmozzi.

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Old 09-13-15, 07:00 AM
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Really a gorgeous bike.

I'll have to keep those brakes in mind when I am doing builds this winter.

Thanks for sharing.

Originally Posted by poprad
Thanks GoMango, it is the finest steed in the stable. I've upgraded recently to the new TRP HYRD cable actuated hydraulic disc brakes, now the brakes match the rest in quality and function. These units are a really cool upgrade, and a mechanic's best friend. No bleeding lines!

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]

[IMG]Vanilla with HYRD brakes by Mark, on Flickr[/IMG]
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Old 09-13-15, 07:03 AM
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Have you used disc brakes GMG? Are they dramatically different?
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Old 09-13-15, 07:14 AM
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I love 'em. The biggest diff btwn disc and caliper type brakes is really the modulation. The "gray area" between barely draggging and full-on is much wider with discs, which gives you a lot more confidence on long and twisting descents. The other obvious bennies of not cleaning the brake track on the rim and no wet fade are nice too, but really side issues in my opinion. The HYRD ones are the best of both worlds to me, super easy setup, mechanically very cool and interesting, and stop like a brick hitting the sidewalk from a 10 story drop.

** edit; sorry, just realized I kinda hijacked this thread. My bad.

More seat clusters goodness:

[IMG]Future Chesini 020 by Mark, on Flickr[/IMG]
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Old 09-13-15, 07:14 AM
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Originally Posted by KonAaron Snake
Have you used disc brakes GMG? Are they dramatically different?
I've used them quite a bit.

For general use around town, it's still hard to beat a Chorus or Record caliper with Kool Stops.

In the wet and gravel, I prefer discs. In fact, we ride in the Bavarian Alps when we visit family and I could really see discs being useful there as well. Long descents get pads overheated. They fade like crazy after a few miles. I could see the discs being helpful.

Up at our cabin, I ride my Fargo constantly and recently upgraded to Spyre discs from BB5s. What a nice surprise.

On my Niner, I have hydraulic 785s and they are outstanding as well.
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Old 09-13-15, 07:40 AM
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Originally Posted by KonAaron Snake
Another Serotta


That paint is something else. Very nice. Which model is that?

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Old 09-13-15, 08:00 AM
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Interesting fastback/seat stay description.

Terraplane Seat Stays | Kirk Frameworks

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Old 09-13-15, 08:02 AM
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Originally Posted by gomango
Interesting fastback/seat stay description.

Terraplane Seat Stays | Kirk Frameworks

Now that's weird.
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Old 09-13-15, 08:11 AM
  #67  
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Originally Posted by gomango
Interesting fastback/seat stay description.
How does one substantiate such claims?

I mean, other than the typical "I sez so."
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Old 09-13-15, 08:13 AM
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The Kirk Terraplane seat stays have a reverse curve on the dropout end.

This is a stainless Terraplane.

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Old 09-13-15, 08:16 AM
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Originally Posted by tmh657
That paint is something else. Very nice. Which model is that?

Colorado 2 - it's a serotta factory repaint.
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Old 09-13-15, 08:19 AM
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Originally Posted by iab
How does one substantiate such claims?

I mean, other than the typical "I sez so."
I dismiss that as largely marketing, but Kirk is really one of the 5 guys I'd consider if I ever got another custom. Regardless of function, it is beautiful and different...and I really appreciate Mr. Kirk's approach.
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Old 09-13-15, 08:31 AM
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Originally Posted by iab
How does one substantiate such claims?

I mean, other than the typical "I sez so."
Dave was head of research & development at Serotta, and had access to some very fancy simulation test equipment.

Did you look at Dave's patent?
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Old 09-13-15, 08:33 AM
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Originally Posted by KonAaron Snake
I dismiss that as largely marketing, but Kirk is really one of the 5 guys I'd consider if I ever got another custom. Regardless of function, it is beautiful and different...and I really appreciate Mr. Kirk's approach.
That's what confuses me. Why make the claims in the first place? What's wrong with just beautiful and different? Are buyers of Kirk that insecure about their bike's "performance"? How often are they attacking corners in a high speed descent? Does it matter if they exit the corner a couple of mph slower?
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Old 09-13-15, 08:49 AM
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Originally Posted by Scooper
Dave was head of research & development at Serotta, and had access to some very fancy simulation test equipment.

Did you look at Dave's patent?
The patent itself offers no data to substantiate the claims.

I wouldn't deny the truthyness of the claims. But to what end? Seems to me it is just to gin up sales. Again, nothing wrong with that either, guy has got to eat. But is he really that hard up for sales he needs to pitch the "performance" route? Seems an odd choice for a custom steel builder. I don't think he can compete against the monster carbon manufacturers. Why bother?
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Old 09-13-15, 08:50 AM
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If the claims can be proven empirically, why not include them in your marketing?
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Old 09-13-15, 08:56 AM
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Originally Posted by Scooper
If the claims can be proven empirically, why not include them in your marketing?
Because at best it comes off as puffery, at worst, deceitful.

He's been in business for a long time. I'd guess his customers are not impulse buyers but people who have thought long and hard about their custom bike. I just don't see puffery appealing to that customer.
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