Guys I have a older Trek 930 single track bike. Cousin that is recently deployed to Afghan gave it to me. He up graded. I would like to pull the wheel bearing and clean them up and repack them in grease. I know alittle grit has made it in the front wheel. I changed out the tires today on it. I guess Am I going to run into anything that not straight forward? How about that rear wheel ? I'm mechanically inclined . But never been in the guts of a bicycle wheel bearings. I just figured some of yall are into bikes and have serviced your own equipment. Thanks WarDawg