Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Another possibility is that you have play at the hub, or the wheel isn't properly tight in the fork. This allows the action of the brake on the disc to move the entire wheel over.
Step one, before anything else, is to see if the rim can be pushed to the side easily. I'm only talking about free play here, not whehter you can flex the wheel sideways against spoke tension.
Otherwise, do as Hillrider said, and check to see where the wheel is "centered" now. If it's off center remove it and remount it backward (disc on opposite side) and see if the rim switches sides. If so, you're wheel is not dished (centered on the hub) properly, and needs the spokes reworked to move the rim over.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance