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• #2
So you have assumed the forces exerted by a set of track nuts is greater than a QR based what testing exactly?
Don't overthink things
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• #3
I’ve assumed nothing. That’s why I’m asking the question.
If it’s ‘ok’ to use track nuts then there’s no issue; but the manufacturers of forks I’ve looked at have listed them as to suit 9mm QR.
Maybe that’s more to do with lawyer lips being incompatible with a lot of track nuts; I don’t know.
Again, that’s why I’m asking. -
• #4
From memory, I did run some Alpina ‘Wing’ aero forks for a while which I think were full carbon and never had an issue with those. In fact they were tough as hell.
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• #5
The forces acting on the fork vary between a qr and tracks nuts.
A quick release is almost all compression and no shear.
Tracks nuts put the carbon into both shear whilst being tightened and then compression.It may not matter, but is probably the reason most manufacturers use metal in this area on carbon forks.
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• #6
There is quite a big difference in the clamping force, mostly by means of the bigger thread and nut which can be banged up quite tight with a spanner. If you’ve ever put a rear wheel in a horizontal dropout with a QR (even a security skewer with a hex fitting at each end) you’ve probably seen it has a habit of slipping.
In my opinion, if you know the dropout is solid carbon then there’s no problem. It will wear out faster than a steel or aluminium one because carbon isn’t very abrasion resistant, so use a track nut with a finer knurl on the back if you can find one. Where we run into problems is knowing if the dropout part is actually solid carbon. See link in CP below. If the end of the dropout is full of consolidator or expanding filler, then it’s just going to crumble out and you’ll be left with nothing to clamp to.
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• #7
Thanks. I would hope that a fork from a well known brand would use substantially solid material.
I mentioned that I like the Dura Ace track nuts as are they are virtually if not completely smooth on the inside so don’t chew up drop outs.
They’re also small enough to fit forks with lawyer lips without having to file them off. -
• #8
If you’ve ever put a rear wheel in a horizontal dropout with a QR (even a security skewer with a hex fitting at each end)...
Not arguing with general sentiment of your post but allen key skewers (ime) are not able to generate anything like the clamping force of a good, enclosed cam qr.
I’ve gone for a slightly more ‘road geometry’ front end on my new custom build and thinking of using an enve or columbus road fork.
Just wondering how folk manage with track nuts on carbon drop outs?
My columbus track forks have alloy ends so are fine but I’m concerned with buggering up a decent fork!
I’m using dura ace hubs and nuts so they’re a bit kinder than the cheaper knurled variety....
Cheers