Can anybody tell me why I have a little nubbin on my lower headset cup and why you would and/or would not have one? It's a small rectangle at the centre of the lower headset cup that appears to restrict the amount that I can turn the bars and after a fairly tame accident at the weekend where the bars hit the ground which in turn moved the headset cup because of pressure applied to the cup through this nubbin I could no longer turn the bars in one direction and had to ride back to car without turning right.
I am thinking that I really don't want to have to take the frame into the local shop every time I have a crash to remove and reinstall the headset should this happen again, which seemed to be the only way to get it aligned centrally again.
Do all internal bearing headsets of this kind have the same feature?
Is it a Trek? Sounds like a 'Knock block' type thing. Designed to stop crowns hitting down tubes on poorly thought out frames.
Or bar controls hitting top tubes.
@submarined it's a YT on a Acros headset. Its been a while since I've bought a bike, the headsets are completly different to what I'm used to
It's to stop your bars turning too far in an accident and accidentally damaging your top tube
Lower cup? It's upside down.
It would be upper cup and the top cap you can cinch up to your steerer to orientate its center.
Photos?
Acros made a Block lock headset, my guess it's one of them.
