I am more than experienced in crapping out wheel bearings. Neuromax is spot on, check for play, and rotation for squeaking, in the wheels. You should be ok, for now. The bearings can be repacked, some say you cant because they are sealed. But I have re-packed many that were sealed. Just like all parts it depends on your riding style and what you ride in. They can be under packed and over packed. Everything I have read says they should be packed about 1/3 of total bearing surface. I replaced mine, all around, at about 1500 miles and they were severely abused. This set has 1800 miles and are in decent shape. I can attribute that to re-packing.