Question about Proflex 753

orange71

Retrobike Rider
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Anybody know what headset size this takes? I have just bought a frame and established that the seatpost is 28.0, strange enough, but the headset is too big for an 1 1/8th quill stem that I have - is it therefore 1 1/4 or even 1.5"?? Here's a photo:
 
i dunno---i built up a 753 for my nephew a few years ago with spare stuff i had and dont remember it being anything odd--pretty sure i used a 1--1/8 headset tho i DID have a threadless steerer and stem--maybe quill/threaded is different???
 
I think given the age of the forks, it'll be 11/8.
Quill stems are 22.2mm for 1in fork, 25.4mm for 11/8 and i think 28.6mm for 11/4, but could be wrong about the last one :LOL:
 
Mine has a 1-1/4" headtube.
Might have a 1-1/4" flexstem ? somewhere :? , just swapped it out for a titanium version. otherwise I have a normal stylee cro-mo stem somewhere, nowt special though
 
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