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For the love of English 3 speeds...

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For the love of English 3 speeds...

Old 08-15-22, 10:11 PM
  #26301  
raleigh76
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Originally Posted by thumpism View Post
Welcome! Can't wait to see the pix.
Thanks! Can't wait to share. I've been lurking in this thread for years, so much knowledge and so many great pics to look at.
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Old 08-16-22, 02:39 AM
  #26302  
Unca_Sam
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Originally Posted by Road Fan View Post
Hi, here's what I hope is a new topic, but I apologize if it is old hat.

I'm rebuilding my 1952 Rudge Aero Special, a 27" Reynolds-framed drop bar bike made in Nottingham. Current stage is to install the H/S cups and the fork. I've been told the head tube IDs are to be 30.0 mm, and mine are (actually 29.97 mm, if I can believe my Harbor Freight digital caliper!). Also, Park Tool says the maximum allowed interference in such a press-fit installation is to be maximum 0.2 mm (not 0.20 mm for some reason).

My fixed cups have OD of 30.28 mm, so the interference is too great to use, if Park Tool is correct. Has anyone ever installed a HS with this much interference? The head tube is 531 with nicely brazed lugs and 70 years old. Should I go ahead and use these cups? They MIGHT be the ones which came out of the frame originally, actually I think they are, but I didn't mark them carefully when I pressed them out and put them in the parts cleaner.

Am I really at risk of cracking my head tube if I force these in, with a pretty decent HS press?

BTW, the bike frame size is about 54 or 55 cm c-c with 27" wheels. Overall geometry is long and laid back, a precursor to the Super Course and the International of 1971.
You'd likely get a better response in the bicycle mechanics forum.
A good bike shop will have a headset reaming and facing tool that will machine the head tube so that the top and bottom have the correct ID and the ends are parallel. It takes a few minutes if the headset is not installed.
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Old 08-16-22, 06:48 AM
  #26303  
dedhed
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Originally Posted by steve21108 View Post
Thanks. Rare hub.
The original S5 was introduced in 1966 and ran to about 1972 with the S5.1 and 5.2 later

​​​​​​Sturmey-Archer Heritage :: History
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Old 08-16-22, 08:28 AM
  #26304  
Road Fan
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Originally Posted by Unca_Sam View Post
You'd likely get a better response in the bicycle mechanics forum.
A good bike shop will have a headset reaming and facing tool that will machine the head tube so that the top and bottom have the correct ID and the ends are parallel. It takes a few minutes if the headset is not installed.
Yes, I'll try mechanics. I do have and have used a reamer/facer as you describe, but I don't think I have a set of cups which fit. The ones which I think were original are about 0.3 mm oversize. After reaming mine are 29.98 mm ID. But I don't have a lot of cutters.
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