Yellow Fang
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I find the seat post on the old Brommie is slipping a bit these days. I've tried tightening up the seat post bolt, but I can only tighten it up so much before I can't pull the lever to.
The Delrin/PTFE washer in the cam on the QR clamp has probably become worn or squashed.
Fit a new one.
I meant a new clamp.Don't you have to buy some special glue?
If nothing else works, I found that a jubilee clip around the seatpost just above the clamp sorted it.
Ah forgot I was in a folding thread! It used to work on an old road bike, maybe not so good on a folder.Presumably you have to loosen the jubilee clip every time you want to fold up the bike?