I have 2 1/2 year old XT hubs (QR). They both spin pretty freely, however the rear is starting to knock, so I'm guessing they'll need serviced. I'll be doing it myself. First stupid question of the day, any particular grease for these lose ball bearings?
Secondly, my cassette has come lose for the 2nd time in about 6 months. First time I got my LBS to tighten it for me, because no matter how correct I seemed to have installed it, it just kept being lose. Is this something to do with the hub axle assembly rather than the cassette itself? I want to sort this ASAP as I'm commuting 50-70 miles per week on the bike.