Headset Help
12-09-16 | 06:47 PM
#1
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Joined: Jun 2015
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From: Louisville, KY
Headset Help
I'm replacing my headset on my 1989 De Rosa Professional as it was 1/2 campy and 1/2 Shimano 600. I'm a newbie at this, so can anyone steer me in the right direction (pun intended 
) as to what I need to order? I guess my biggest concern is about the threads. I have no idea if on this year whether it would have been considered "Italian" or if it is ISO. It does have the original 1" steerer tubed forks. I understand the threads were cut different if it's Italian, but I would have not idea how to check that.
Thanks in advance.
) as to what I need to order? I guess my biggest concern is about the threads. I have no idea if on this year whether it would have been considered "Italian" or if it is ISO. It does have the original 1" steerer tubed forks. I understand the threads were cut different if it's Italian, but I would have not idea how to check that. Thanks in advance.
12-09-16 | 06:52 PM
#2
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Joined: Apr 2009
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
The ISO and Italian fork threads are the same diameter and pitch, except that 1" ISO (BSC) has standard 60° thread forms and the Italian 25.4mm is a Whitworth 55° profile.
They're close enough that folks have long since stopped worrying about the difference.
Usually, the underside of the locknut has the thread info stamped in, or if you have a magnifying glass, thread form gauge and good eyes you can read the fork.
They're close enough that folks have long since stopped worrying about the difference.
Usually, the underside of the locknut has the thread info stamped in, or if you have a magnifying glass, thread form gauge and good eyes you can read the fork.
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FB
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 12-09-16 at 06:57 PM.
12-09-16 | 07:08 PM
#4
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Joined: Aug 2005
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From: Pittsburgh, PA
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Thanks a million!
12-09-16 | 07:12 PM
#6
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Joined: Apr 2009
Posts: 39,897
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
So is that 500,000 each?
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
12-09-16 | 09:08 PM
#8
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From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Sounds like the Joe and Willy "cartoon" (and that term is loosely used here) by Bill Mauldin. Joe has just crossed a gap in the battlefield under bad guy fire. he turns to Willy and says " that's another $10,000 I owe you". Meaning that he bet Willy he wouldn't make it once again. Andy (who wasn't born back then but has high regard for those guys).
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04-20-12 09:47 PM
