I was on TOSRV last weekend and there was a grinding noise in the back wheel. A mechanic from TREK who trains bicycle wrenches took the hub apart and repacked the bearings. He told me the housing was bad and to take it easy so I could finish the century. I came home and went to the LBS who ordered the part. Now I am wondering if it is safe to ride another century tomorrow. I thought I was happy to finish TOSRV, but a girl in my bike club said her housing was bad and she has been riding for a long time on it. I don't want to do additional damage to the bike. Should I ride it tomorrow? I have a cell phone so I can call home if it fails. BTW, how will I know it fails, will the wheel lock up or fall off or will it just develop more play and make more noise?