Originally Posted by
WizardOfBoz
I guess if you had a very larger quill bolt with a threaded hole in it.
Don't know if I agree with the "very" bit. But otherwise, that's how BBB does it.
Originally Posted by
WizardOfBoz
But this would be madness: a high-strength socket headed cap screw is harder than woodpecker lips..
A high-strength Allen might be. But bicycles generally get away with regular grade fasteners. These can be drilled, tapped, filed etc w/o any drama.
Originally Posted by
WizardOfBoz
...and drilling and tapping would weaken the thing considerably.
Not really a problem when starting from scratch. It's easy enough to pick or design a bolt that'll still be strong enough when drilled and tapped.
Originally Posted by
WizardOfBoz
I could see an alternate design with a large-diameter screw with a hole in it holding the cap down, but ... why?
Possible reasons include:
- letting the riders use whichever top cap they prefer
- perhaps a bit weight savings from not needing the thicker bolt all the way through
- the stem can be removed intependently from the adapter/extender.
- maybe patent/copyright issues prompting the use of different designs
Originally Posted by
WizardOfBoz
.. these things don't usually have an M6 bolt holding the cap on.
I've never seen one with the wedge bolt visible up top.
Different markets I suppose.
Originally Posted by
WizardOfBoz
But I have a question. I'm not too enamored of my Profile Design quill adapter. It's too short, and the wedge doesn't make it as solid as I feel it should be (too much flex). Are there longer quill adapters that don't have as much tolerance on the stem (that is, that have a slightly larger diameter that better fits the steerer tube), or perhaps quill adapters that have a better fixing mechanism than the wedge?
Since you don't say how tall your adapter is, its difficult to say with certainty which would be taller.
But you might want to check BBB's adapters.
The wedge is the traditional mounting method. Stems sometimes comes with an expander design instead. Never seen it on an adapter.
Increased rigidity is one of the claimed advantages of threadless stems/steerers.
They're probably all made towards the same fit. Don't think there's any way of promising a tighter fit.
You might try shimming yours.