Join Date: Jun 2010
Location: NW,Oregon Coast
Mentioned: 29 Post(s)
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Considering they have not been made for over 20 years you got good lifespan out of it, Buy a new rear Mech.
rest of the drivetrain been used as well , an update is in order, [unless it has been ridden around the block then put in a time capsule..
You can still get 630/27" rims to rebuild your wheels , But if the brake-shoes adjust down just 4 mm you can adopt the more common 622/700c type.
Mountech, It was their engineers attempt to do something like Huret's Duopar.
on those, a second parallelogram moved up and down with the cog diameter,
and the main parallelogram moved in and out
Last edited by fietsbob; 07-05-10 at 08:01 PM.