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Headset question
Referencing an older 1", threaded headset.
What is the difference between a "BMX" device described above and the more traditional headsets? The reason I ask is that I'm doing a restoration on an old BMX. I'm not being real picky about parts like headsets and brackets... if they fit, I'll use 'em. Jones |
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#2
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Headset question
!Jones wrote:
Referencing an older 1", threaded headset. What is the difference between a "BMX" device described above and the more traditional headsets? The reason I ask is that I'm doing a restoration on an old BMX. I'm not being real picky about parts like headsets and brackets... if they fit, I'll use 'em. http://www.sheldonbrown.com/gloss_ha-i.html#headset Designed for a smaller steerer tube diameter. |
#3
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Headset question
On Sun, 09 Sep 2007 18:18:16 +0100, in rec.bicycles.tech Zog The
Undeniable wrote: http://www.sheldonbrown.com/gloss_ha-i.html#headset Designed for a smaller steerer tube diameter. I shoulda known to check Sheldon's site. So, I can't drop a 1" fork designed for a recumbant 20" wheel into a BMX frame without major modification. Rats! Jones |
#4
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Headset question
On Sun, 09 Sep 2007 18:07:29 GMT, in rec.bicycles.tech !Jones
wrote: On Sun, 09 Sep 2007 18:18:16 +0100, in rec.bicycles.tech Zog The Undeniable wrote: http://www.sheldonbrown.com/gloss_ha-i.html#headset Designed for a smaller steerer tube diameter. I shoulda known to check Sheldon's site. So, I can't drop a 1" fork designed for a recumbant 20" wheel into a BMX frame without major modification. Rats! Jones Well... they're both 26.4 on the inside race. I'm going to hit the problem when I try to screw on the top race because the steerer tube of the ISO std. will be too big by .047. So, if I were to put it on an OD grinder, take it down to .833, and recut the threads, it should work. Even if there is some thread left after grinding, that's OK because they're both 24 tpi. Jones |
#5
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Headset question
!Jones wrote:
What is the difference between a "BMX" device described above and the more traditional headsets? The reason I ask is that I'm doing a restoration on an old BMX. I'm not being real picky about parts like headsets and brackets... if they fit, I'll use 'em. That's the difference. They are not the same size as road 1" headsets. -- David L. Johnson The lottery is a tax on those who fail to understand mathematics. |
#6
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Headset question
!Jones wrote:
Referencing an older 1", threaded headset. What is the difference between a "BMX" device described above and the more traditional headsets? The reason I ask is that I'm doing a restoration on an old BMX. I'm not being real picky about parts like headsets and brackets... if they fit, I'll use 'em. Same thread, 'BMX' has a smaller opening in the locknut for a USA stem and larger frame cups. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#7
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Headset question
On Sun, 09 Sep 2007 18:18:16 +0100, in rec.bicycles.tech Zog The
Undeniable wrote: http://www.sheldonbrown.com/gloss_ha-i.html#headset Designed for a smaller steerer tube diameter. !Jones wrote: I shoulda known to check Sheldon's site. So, I can't drop a 1" fork designed for a recumbant 20" wheel into a BMX frame without major modification. Rats! Change the locknut. Or ream it. It's stem diameter not steerer OD. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#8
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Headset question
On Sun, 09 Sep 2007 21:22:16 -0500, in rec.bicycles.tech A Muzi
wrote: Change the locknut. Or ream it. It's stem diameter not steerer OD. Yeah, thanks... I finally gleaned that after reading carefully. I think I'm going to shim the fork... it's a $10 fork and a $100 headset. The fork is just holding a place until a Littlejohn fork appears on eBay to match the frame. It will, sooner or later. Jones |
#9
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Headset question
On Sun, 09 Sep 2007 21:22:43 -0400, in rec.bicycles.tech "David L.
Johnson" wrote: !Jones wrote: What is the difference between a "BMX" device described above and the more traditional headsets? The reason I ask is that I'm doing a restoration on an old BMX. I'm not being real picky about parts like headsets and brackets... if they fit, I'll use 'em. That's the difference. They are not the same size as road 1" headsets. Yeah, got it... but it's a frame issue as I read it. The 1" dimension really is one inch and the inside race is the same. Now, I have never had a "threadless" headset and I'm not sure I'm reading Sheldon right. The threaded Vs. threadless thing is entirely a function of the *fork* & headset and independent of the frame, am I right? Jones |
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