Originally Posted by
Jynx
I heard that skewers have a large effect on wheel stiffness (as far as the wheel flexing into the brakepads) and that cheap or weak skewers lead to a lot of brake rub and it is best to stay with steel skewers if that is a concern. Is this a problem with the lightweight KCNC's? I weigh 190 so I am no lightweight.
Originally Posted by
timmyquest
The hub sits in the dropouts though...
Since that is correct I would assume that your best chance of getting lateral movement is going to be as a result of the hub and/or wheel. Unless, of course, your skewer can't provide enough clamping force to hold the hub in place. As for that.. well.. these don't seem to provide any less clamping force than any of my other skewers. I put them on quite tight and haven't had them slip yet.
I weigh 160, however, I don't have a ton of mileage on them yet (maybe 300-400 miles). I haven't had any brake rub issues with them. I also haven't seen any reports of slippage or rub issues with the skewers from others. I'm sure some other people on here can chime in on that if they have had problems.
Out of curiosity I did a search and all I could find re: slippage was one person who had a problem and then they realized that
they simply weren't tightening it well enough. That I could see, as the shorter length lever probably transmits a less tight "feel" for a given amount of force. That said, even getting them really tight for me is by no means hard. I go by the "just tight enough to leave an imprint in your palm" standard that is recommended by some manufacturers.
Originally Posted by
BananaTugger
And the dropouts do have some compressive force applied to them by the QR's.
Bad closed cam QR's aren't going to squeeze as hard as good open cam or quality closed cam QR's will.
The result is a QR with end caps that are sliding all over the outside of the dropout, letting the hub axle ends become unseated when getting torqued on.
These are open / exposed design, and I see nothing low quality about them. The washers in the open cam are also metal, which leaves me to think there is less of a chance for deformation than there would be with the more common plastic washers.
Originally Posted by
kimconyc
Yes, I weigh 150 lbs and I cannot use the KCNC skewers on my steel bike, particularly the rear wheel. I do not race and am weak but when mashing or sprinting hard on my steel bike, I make the rear brakes rub (this is partly due to the dropout style on the steel bike) when using KCNC skewers. I changed the rear skewer to a Dura Ace internal cam and everything is fine.
On my CF bike, the KCNC skewers are fine; you have to make sure to get them tight though because of their short lever, it seems like they are tighter than they actually are.
This definitely sounds like a function of your particular frame, which is confirmed in that they work OK on a different bike. To me this sounds like a potential dropout wear issue, which
Lennard Zinn has previous discussed. All you need to do is ride with improperly-tightened QRs for a bit, consequently wear a groove into the dropout face, and then no matter how much you tighten you are going to be out of luck. The closed cam Dura Ace may have had a larger contact area or a different tooth pattern / texture that overcame whatever problems you had. At any rate, something to take a look at the next time you take off your back wheel.