Originally Posted by Chombi1

The thread is coarse metric. Don't know the size though....

Originally Posted by Chombi1

The allen head bolt on the 84 Peugeots had a pointy nose to it that dug into the machined groove on the seatpost.it will only look bad if you have to raise your saddle as you will see the divot.I never really liked Peugeot's version of this type of seatpost anchorage as it really puts a lot of concentrated stress on the seat tube and the boss which could eventually lead to them cracking, if you mistakenly tighten it too much.....Peugeot must have thought the same as they only used it for the 1984 model year. Later bikes either went back to conventional seat lug clamping ears or quill seatposts after 84.​​​​​​​

Originally Posted by 1simplexnut

Well I pulled the critter out of my red Vitus .
Appears to be correct ? with a flat face to push on the machined flat on the post (should have taken a pic of that too I suppose ?)
The separate tip does not want to rotate but is a different material . Appears to be hardened after a quick swipe with a file .
I see a curve to the od of the tip so suspect a ball with a flat ground in it .
All good fun .






Vitus in red

Originally Posted by 1simplexnut

hiya - There is a corresponding flat machined in the correct seat post for these frames .
I know what you are saying though . I have a couple of 80s PX10 with an allen head capscrew in the seat tube which locks the seatpost just fine .
Disparaged by most out there but I have never had any issue with it slipping .