Join Date: Aug 2007
Location: The Island City of Alameda
Bikes: '70s Peugeot Fixie, Surly Long Haul Trucker
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Saggy Chains and Shimano 600 Parts
I recently inherited a 1980-81 Peugeot bike from a family member. The thing is in stellar shape except for one annoying little detail, which is that as soon as I pedal backwards the chain sags alarmingly between the rear cogs and the chain ring. To make it even more obnoxious, about one out of every four times I stop pedaling it feels like to rear cogs/freewheel continue to kick or grab and the chain sags and jerks back and forth. If I put it on a stand and turn the cranks, as soon as I let the rear wheel just spin I can watch my chain jump around and my rear derailleur extend and retract as the drive train alternates between spinning free and grabbing.
So far I've tried adjusting the derailleurs and messing with the chain tension. There's no B-tension screw on Shimano 600 derailleurs, or at least I can't see it, so I removed two links from the chain. It got better, but no so much better that I'm excited to ride the thing while I listen to the chain rattle around.
Is it a chain tension problem? Is the free wheel acting up, or does it sound like the rear derailleur is binding? Any help is greatly appreciated.