Hi! I'm a regular over at the C&V sub forum and know my way around a wrench on most things vintage. I'm hoping knowledgeable Bike Mechanics can assist me or at least alleviate any unfounded concerns.

Here's the problem: I have a SRAM Dual Drive equipped Cannondale from 2002-03. I'm the original owner and I've kept up with regular maintenance, cleaning, etc. Last week while installing a new chain, cleaning the 9 speed cassette, and relubing the RD, I noticed there is a slight side to side wobble in the hub. Since this is a 3 speed internal hub with sealed bearings, creatures I'm not all that familiar with, I don't believe there are any cones and lock nuts to adjust (if it were a '60s-70s vintage Campagnolo Record HF hub, I'd say it would need about 1/8-1/4 turn on one cone).

So is it time to have the sealed bearings replaced? Or is this normal? The wobble is slight. Also, is there any other maintenance that can be done to this hub? Do the internals need to be oiled or greased on any kind of schedule? While I could do some research and tell you exactly how many miles are on the bike, my best guess off the top of my head is something on the order of 4000-5000 miles.

Thanks for your assistance and guidance!