Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.sers
05-28-07, 03:47 PM
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.