I have been searching under "maintenance" and some other words, and also browsing Sheldon Brown's site but have not found what I am looking for. I am sure there are some threads that will help.
I need to know what preventive or restorative maintenance my 2007 Trek 1500 requires. I used to ride 20 years ago and every few weeks I'd repack all the bearings, and always repack immediately after a ride in the rain. My bottom bracket had lightening holes in it, but really they functioned as a grease-drain.
So do I need to repack the bottom bracket, hubs or headset on this bike? Where might I find out if I have "sealed" bearings and what I need to do to maintain these bearings?