Originally Posted by
cat0020
Is there a shim in the seattube?
Misaligned shim?
Sigh. I put Park Tool paste and forgot to cleanup it before putting the collar. Just cleaned that up. Good eyes!
The seat tube has 4 cutouts that can be seen depending on the angle you look from; I guess they are for a uniform distribution of the collar's pressure.
In this picture the collar's cutout is also misaligned compared to the center of the bike - took care of that too.