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Carbon Fiber Quick Releases(6 posts)

Carbon Fiber Quick ReleasesDave Hickey
Apr 10, 2001 12:50 AM
Does anyone make carbon fiber quick releases? I'm not a weight weenie, I'd be interested just for the look.
Not that i knowIxiz
Apr 10, 2001 6:05 AM
The shaft is in tension and Carbonfibers are not well known for that property. But then again they can tailor it to anything. Then the issue of the junction between the shaft and the lever would be hard to design
Skewers & QR'sBreck
Apr 10, 2001 8:04 AM
Had this interest myself and not because am a weight-weenie either as run steel Dura-Ace on the OCLV.

As you know, Control Tech ( & others) offered a 23 gram front; 26 gram rear, set of skewers that did not pretend to be Quick Releases. Instead of using a rod fastened to a rotating cam for closure, they used a Ti machined bolt with a 5mm hex fitting and 5mm X 0.8mm pitched threads. You would slide the fixed head skewer in from one side and screw the other "nut"-side on using a 5mm hex wrench.

And as you know, there are even some wheel-to-hub fasteners that rely on threaded hub axles and threaded bolts for each side to clamp the hub onto the drop outs.

For the absolute lightest skewer set was wondering if you had threaded end axles on the hub, you could design a carbon head/ alum threaded bolt fastener for the axles, which would have to be threaded of course and a hex wrench needed.

Sorry, a little off-topic but bike stuff none the less.

cheers
bgcc
Threaded hubsBrian B.
Apr 10, 2001 2:51 PM
I'm running a strange wheelset that has Bullseye hubs laced to Campy Omega 19 rims. I traded a set of mtb wheels for 'em, so I have no idea of their history. The neat part is that the Bullseye hubs are threaded, and there's little hex bolts & washers to hold them on. But the really neat part is that a regular skewer slides right through, too. So you can bolt them up, for lightness or security (theft) or just use regular skewers for convenience.

Sorry, this post has nothing to do with Carbon fibre qr's. But you can easily find "Carbon-look" stickers, and dress up some old qr's with it.

Brian B.
Skewers & QR'sHomer
Apr 14, 2001 6:22 AM
I used to own a pair of the "threaded" ti skewers. And they don't
work very well.

While tightening the rear non-QR so that the wheel does not come off
while doing a power sprint, I could hear all these screeching metal
sound. I tighten the rear non-QR so tight that I saw sparks.

And it could ruin your rear dropouts as the etched nuts on the non-QR
is literally grinding on your frame's droputs.
Bzzzzt!grz mnky
Apr 10, 2001 3:44 PM
Actually CF does extremely well in tension and this is why it *is* used in many applications. It's actually compression where CF does poorly.

The really ticky part using CF for mechanical components (in the traditional sense) is that threading it (as either a nut or bolt) doesn't work well since the threads are in compression. You're better off taking advantage of the ability to mold the material and orient the fibers with respect to the stresses.

You could probably get away with the levers made of CF, but why not cut to the chase and use ti, ala Control Tech and others.