nickw
07-19-06, 01:48 PM
This is for my 82' trek 950, full columbus....I am assuming its a 28.6, but I am not sure. The centaur front derailleur want only comes in 32mm or 35mm, in which case I might have to use a shim. Any thoughts?
Classic & Vintage - Front clamp diameter, 28.6 or 32mm
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oglala_1927
07-19-06, 01:56 PM
To make things easier if you do a lot of bike work, buy a metric tape measurer and a metric micometer!:D
cyclezen
07-19-06, 03:42 PM
This is for my 82' trek 950, full columbus....I am assuming its a 28.6, but I am not sure. The centaur front derailleur want only comes in 32mm or 35mm, in which case I might have to use a shim. Any thoughts?
'82
was before a lot of the oversize and asym tubesets became available - if Columbus, almost certainly 28.6
my Limongi (531 SL) is actually a slightly smaller than 28.6 and a Campy NR FD doesn't work, I have to use a Galli on it (more space between clamp bands...)
drop a post when you find a shim that works for you, invariably anything that has worked for me has also removed the paint on the frame when I've pulled the FD for maintenance.
I think Shimano supplies a shim with some of their FDs, but I've not ever found one (not looked real hard, just went with an FD that fit - if it works, I'm not picky)
'82
was before a lot of the oversize and asym tubesets became available - if Columbus, almost certainly 28.6
my Limongi (531 SL) is actually a slightly smaller than 28.6 and a Campy NR FD doesn't work, I have to use a Galli on it (more space between clamp bands...)
drop a post when you find a shim that works for you, invariably anything that has worked for me has also removed the paint on the frame when I've pulled the FD for maintenance.
I think Shimano supplies a shim with some of their FDs, but I've not ever found one (not looked real hard, just went with an FD that fit - if it works, I'm not picky)