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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 08-21-09, 05:31 PM   #1
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Headset help!! Centurion Iron man!

To all you Centurion Iron Man owners out there, and people who have experienced the same problem alike...

For my new build I wanted a new black headset to go with my awesome powder coat job.
I needed to find a 1 inch threaded headset for my Iron Man, and I ordered a really sweet Nashbar alumnium headset with sealed bearings and all (one of the very few headsets i could find in black)

The problem is, when I tried to put it on:
A. The crown race didn't fit around the very bottom of the fork, it was too small
B. The stack height was too high and there was barely any threads poking out before the locknut was put on, not even enough for the lock nut to catch

I tried to use the old crown race, and it still wasn't enough, i need about 5 mm for the locknut to catch!

The Nashbar website said their headset has about a 38mm stack height.

Is there any other headsets out there that any of you guys have used before with a lower stack height?

If I cleaned up the original and used that would it booger it up if I painted it black? (Which paint is recommended if I do paint it?)

Lots of questions that need answering!

thanks guys.
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Old 08-21-09, 06:02 PM   #2
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well the stack height being too high might have something to do with the fork not going all the way in... i would say use the original headset, but don't paint it because that probably won't last.

personally i'd rather have a bike that works instead of a bike whose headset matches the frame color...

SORRY IF that doesn't help a whole lot, i can't think of any black threaded headsets offhand.
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Old 08-21-09, 09:47 PM   #3
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Black 1 inch JIS threaded headsets are available at with (I am assuming) a 32mm stack height as it comes on their frame which requires a 32mm stack height. Cost: $19.00
Also, find a way to measure (preferably with calipers) the diameter of the spot where the crown race is pressed on to (crown race seat).
JIS (Japanese Industrial Standard) bikes, which Centurions are due to their manufacturing in Japan, use crown race diameters of 27.0mm and ISO (International Organization for Standardization) bikes use 26.4mm crown races.
The Nashbar headset does not fit because it is probably the more common ISO standard.

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