Board Thread:General Discussion/@comment-27122798-20151026170733/@comment-27122798-20151026191838

I am wrong! Adjusting the height of the handle bars is not done via the collar.

It looks like it is done by the top nut on the handle bars. This appears to be a long bolt connecting to a wedge further down the tube. a look at models other than the mailstar suggests this is the method to raise/lower handlebar height.

The only difference I can see between Mailstars and the other models is that mailstars have two grub screws while the others have a second locking nut to tighten together.