Columbus Pegorichie, Pegoretti heat treated, Spirit Keirin?
05-28-07, 03:47 PM
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Columbus Pegorichie, Pegoretti heat treated, Spirit Keirin?
From competitivecyclist.com's Pegoretti write up:
In fact, all of the Niobium tubing Pegoretti uses is one-off. He insists that Columbus take the extra step to heat treat the tubes for him. While the stock version of the tubes has very good elongation qualities and thereby provides a nice bit of shock damping, heat treating them gives them a considerable increase in responsiveness under a load. Think of it this way: While a spring is springy by nature, a heat treated spring rebounds from compression far more quickly. In other words, a heat treated Niobium Spirit frameset will provide superior elasticity, making a Pegoretti feel like it's gliding on a lousy road surface to an extent unmatched by other tubesets.
Is that steel the same as Columbus Pegorichie? I beleive I read that Pegorichie is Columbus Spirit manufactured specifically for lugged construction, which leads me to my next question: Is this tubeset also marked as Columbus Spirit Keirin? Given that most Japanes Keirin framesets are lugged, I wondered if they would want the same characteristics in a tubeset.
Is Pegorichie available to all framebuilders who use lugs, or only the two of its namesake? I would love a frame built of that heat treated Columbus, as I ride every day through the city, rain or shine. However the practicality of having a Lugino 'street fixed' is not looking good.
In fact, all of the Niobium tubing Pegoretti uses is one-off. He insists that Columbus take the extra step to heat treat the tubes for him. While the stock version of the tubes has very good elongation qualities and thereby provides a nice bit of shock damping, heat treating them gives them a considerable increase in responsiveness under a load. Think of it this way: While a spring is springy by nature, a heat treated spring rebounds from compression far more quickly. In other words, a heat treated Niobium Spirit frameset will provide superior elasticity, making a Pegoretti feel like it's gliding on a lousy road surface to an extent unmatched by other tubesets.
Is that steel the same as Columbus Pegorichie? I beleive I read that Pegorichie is Columbus Spirit manufactured specifically for lugged construction, which leads me to my next question: Is this tubeset also marked as Columbus Spirit Keirin? Given that most Japanes Keirin framesets are lugged, I wondered if they would want the same characteristics in a tubeset.
Is Pegorichie available to all framebuilders who use lugs, or only the two of its namesake? I would love a frame built of that heat treated Columbus, as I ride every day through the city, rain or shine. However the practicality of having a Lugino 'street fixed' is not looking good.
Last edited by sers; 05-28-07 at 03:56 PM.
05-28-07, 04:52 PM
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I gather from Richard's post on frameforum that Pegorichie tubes are available to all frame builders.
Why not ask him?
Why not ask him?
05-28-07, 07:01 PM
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That competitive cyclist write up is so wrong from a technical standpoint that I don't even want to start to respond to it. 
Sum it up by saying that heat treating the tubes makes them stronger but unless the wall thickness is reduced or the tubes are made larger in diameter it won't change the way the frame rides in any way.
My understanding is that Pacenti is going to stock the Pegoriche tubeset. https://bikelugs.com/ The salient feature of this tubeset is the longer than standard butt lengths compared to most tubesets these days that are short butted for TIG. The tube butt thickness are just right (my opinion) for a medium weight frame - .7/.45mm. Good stuff for the lugged boys but of course there is no reason it couldn't be TIg'ed either. The tubeset that it most reminds me of is ELOS - one of the all time greats. The Spirit Keirin tubeset is smaller diameter than the Pegoriche set so clearly it's different.
Sum it up by saying that heat treating the tubes makes them stronger but unless the wall thickness is reduced or the tubes are made larger in diameter it won't change the way the frame rides in any way. My understanding is that Pacenti is going to stock the Pegoriche tubeset. https://bikelugs.com/ The salient feature of this tubeset is the longer than standard butt lengths compared to most tubesets these days that are short butted for TIG. The tube butt thickness are just right (my opinion) for a medium weight frame - .7/.45mm. Good stuff for the lugged boys but of course there is no reason it couldn't be TIg'ed either. The tubeset that it most reminds me of is ELOS - one of the all time greats. The Spirit Keirin tubeset is smaller diameter than the Pegoriche set so clearly it's different.
05-31-07, 12:54 AM
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Originally Posted by Nessism
That competitive cyclist write up is so wrong from a technical standpoint that I don't even want to start to respond to it.
I can hear Falanx thumping the desk as I type this *laugh*
