Well I won a rear wheel off ebay from Boulder Bike Works out of Colarodo and upon examining it I noticed when I look through where the axle goes looking through you can see something out of line. I think it is what is called the collar in the wheel, its like the collar is out of place by about an 1/8"...and the nuts holding the sprocket on are like glue they won't seem to budge. The wheels not screwed or nothing is it?