Originally Posted by
voor9
...
One thing that tells something with geared bikes is that on smallest cog(s) the chain slip when pressured with hard pedaling, and it means that the frame is giving up. It is not as sturdy anymore than it was. That can't be seen just on bare eyes, except looking how worn the cogs, chain or derailleur pulleys are. But somebody might have changed them at some point.
So happened with a beautiful Peugeot. Paint job was still pristine. Did everything, changed all I could but the chain was skipping/slipping. So had to turn it to be single speed, unfortunately. And with a quite light gear ratio. When giving a lot of pressure to pedals, the chain was skipping annoyingly. ...
Are you sure the problem was in the frame itself? Every chain skip problem I have ever encountered was caused by chain elongation, cog tooth wear, freewheel float, loose crank or rear axle bearings, and/or chain/cog incompatibility.
I have BROKEN two steel frames in the driveline area -- Nishiki Competition at the bottom bracket shell's seat tube lug, Peugeot UO-8 on the drive side chainstay, but that is, of course, a total failure, rather than a general "giving up" (softening?) of the frame.
Comments/reactions from others?
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069