Originally Posted by argentcorvid
have you looked at the wheel bearings? they are regular ball bearings pressed into the outside of the wheel. you should be able to see the outer race and dust seal, along with the tube the axle goes through on the swingarm. there should be NO GAPS. if there is a gap, your bearing is probably toast. if you bearing has been screwed up long enough to affect tire wear, your wheel might be done too. luckily you can still get new ones.
This. XB12X had tons of rear wheel bearing issues.