Headset threads question
03-03-12 | 10:12 PM
#2
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From: Elwood Indiana
Bikes: they change so much I'm tired of updating this
does it matter? i can get a great deal on a record headset but its english threads. i had heard that italian and english are close enough to be compatible. is this true? thanks
03-03-12 | 10:21 PM
#3
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From: Ann Arbor, MI
Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8
I'm pretty sure your Colnago wants Italian threads and sizings on its headset. Look up Headsets at sheldonbrown.com and read about if it matters.
03-03-12 | 11:18 PM
#4
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Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
the difference between English and Italian threading is a slight difference in thread pitch. One thing I keep hearing about using the two different threadings with each other is to try not to remove and reinstall the components too much after the first time you install it. I guess there might be a high possibility of cross threading the parts if you do. Mixing the two can be done but matching the threads is always the better way to go to avoid problems.
Chombi
Chombi
03-03-12 | 11:51 PM
#5
verktyg
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From: SF Bay Area
Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1980s DeRosa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1988 Colnago Technos, 1985 RalieghUSA SBDU Team Pro
the difference between English and Italian threading is a slight difference in thread pitch. One thing I keep hearing about using the two different threadings with each other is to try not to remove and reinstall the components too much after the first time you install it. I guess there might be a high possibility of cross threading the parts if you do. Mixing the two can be done but matching the threads is always the better way to go to avoid problems.
Chombi
Chombi
The British standard and now ISO standard is 1"-24TPI. Italian headset threads were 25.4mm x 24TPI, almost the same.
You can easily force fit one on to the other but don't change Italian with British back and forth.
Also fitting a British aluminum alloy headset on an Italian steerer or vise versa can damage the aluminum threaded parts.
Chas. verktyg
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