Quote:
Originally Posted by BodhiBenz1987
Thanks. I cleaned everything thoroughly and used steel wool to smooth up a couple rough patches on the hubs. It helped a little, but there's still some runout ... it does help to measure it with a spare lugnut opposite the allen screw, then I get pretty much no runout. I guess the wheels hold it even once they're on. It seems like an odd design to me.
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A wire brush chucked in a drill or grinder will clean the hub very well. If your trying to check for run out you would need even clamping pressure on the rotor so three lug bolts would do that.
In use the rotor is clamped between the wheel and the hub, I suspect the 5 mm Allen screw is just there to keep the rotor from coming free with the caliper off and landing on someones foot in the shop. The torque spec for it is minimal at best with regard to any clamping force. Take a look at the inside of the rotor for anything stuck there or a burr or other manufacturing defect.