Upgrading an old road bike's fork to threadless.
09-22-11, 07:42 PM
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Upgrading an old road bike's fork to threadless.
Can you swap out a 1" threaded fork with a 1 1/8" threadless fork?
I know I'd have to use a different stem and headset, but would the small increase in diameter matter at all? Would it still fit inside the head tube of the frame?
I know I'd have to use a different stem and headset, but would the small increase in diameter matter at all? Would it still fit inside the head tube of the frame?
09-22-11, 07:48 PM
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it wont fit inside the frame.
you could upgrade to 1in threadless but there wouldnt be any real benefit unless you planned to get a full carbon fork for the sake of weight savings.
you could upgrade to 1in threadless but there wouldnt be any real benefit unless you planned to get a full carbon fork for the sake of weight savings.
09-22-11, 10:10 PM
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FWIW, one of my bikes had a threaded headset labeled "25.4", which I originally assumed mean the headset diameter. It turns out that it instead referred to the stem diameter that would fit into the steerer tube. I was therefore able to swap a 1-1/8" threadless fork & headset for my quill stem, headset, and suspension fork. If in doubt, use Sheldon Brown's quarter method to check stem diameter.
https://sheldonbrown.com/headsets.html#size
https://sheldonbrown.com/headsets.html#size
09-23-11, 01:31 AM
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FWIW, one of my bikes had a threaded headset labeled "25.4", which I originally assumed mean the headset diameter. It turns out that it instead referred to the stem diameter that would fit into the steerer tube...
https://sheldonbrown.com/headsets.html#size
https://sheldonbrown.com/headsets.html#size
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'72 Cilo Pacer • '72 Peugeot PX10 • '73 Speedwell Ti • '74 Nishiki Competition • '74 Peugeot UE-8 • '86 Look Equipe 753 • '86 Look KG86 • '89 Parkpre Team Road • '90 Parkpre Team MTB • '90 Merlin Ti
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-Randy
'72 Cilo Pacer • '72 Peugeot PX10 • '73 Speedwell Ti • '74 Nishiki Competition • '74 Peugeot UE-8 • '86 Look Equipe 753 • '86 Look KG86 • '89 Parkpre Team Road • '90 Parkpre Team MTB • '90 Merlin Ti
Avatar photo courtesy of jeffveloart.com, contact: contact: jeffnil8 (at) gmail.com.
09-23-11, 05:42 AM
#5
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Won't fit. There are a limited number of threadless 1" forks out there. I believe Ritchey makes a carbon one, which I'd consider an upgrade over a lot of forks. I've only ever seen one full carbon 1" threadless...a colnago. Don't know if anybody makes such a thing any longer.
09-23-11, 11:28 AM
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Nashbar has 1" threaded ( in some lengths) and 1" threadless forks that have alloy crowns and steerers. I bought a threadless one to go on a 91 Paramount (Oversea made). The Paramount had the non-lugged crown on the stock steel fork. I like the looks of the Nasbar fork with the new stem and spacers. The carbon legs have a similar swept look as bikes of that era. Marginal weight difference between the original Paramount fork and the Nashbar carbon/alloy fork. I do like the feel with the new fork, but I like the feel of old steel bikes with any fork.
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