Is running an 8 inch rotor in the front with Quick release a bad idea ?
If so why ?
If so why ?
8 Inch Rotor question
- Thread starter splat
- Start date
Generally, it's not such a great idea. The 8" rotor puts a lot more force on one side of the wheel, causing twisting. The QR doesn't resist twisting as well as a thru-axle, or even a solid bolt-on axle will.
You'll get a hundred people who say they run an 8" rotor on a QR and it's fine and blah blah blah, I'm just letting you know why it might not be a good idea
. Frankly, anything that might cause my front axle to break is to be avoided, IMHO.
Avid makes 7" rotors for a happy medium. Or, your LBS will probably have solid bolt-on axles that you could swap out for the QR. Not as convenient, though.
I like 20mm
You'll get a hundred people who say they run an 8" rotor on a QR and it's fine and blah blah blah, I'm just letting you know why it might not be a good idea
. Frankly, anything that might cause my front axle to break is to be avoided, IMHO.Avid makes 7" rotors for a happy medium. Or, your LBS will probably have solid bolt-on axles that you could swap out for the QR. Not as convenient, though.
I like 20mm
The geometry of some dropouts is such that the force applied by the brake can cause the wheel to be 'pulled' out of the dropout. One of the mfg (cant remember who at the moment) said in new literature that they changed the dropout angle to adress this.
dave, I think I read some about this and the 6" rotors pull at an angle that is more 'out of the dropout' than the 8" ones do. Splat, try searching on this. My old bike came specced with an 8" rotor and a 30mm stanchion fork, I would not worry about it.
Any disc/QR setup though, watch to make sure the QR does not loosen after a run / long descent.
Any disc/QR setup though, watch to make sure the QR does not loosen after a run / long descent.