Clipless pedals should be cleaned and lightly greased, particularly the contact points where your cleat connects and any internal bearings or moving parts. Flat pedals don’t need external greasing, but should also be cleaned and gently greased where they spin around the crank.
6. SEATPOSTS AND SADDLES
It’s probably the one part you think least about: Where you sit down. Failing to maintain this essential part, however, can actually ruin the frame of your bike.
Make sure it can move smoothly up and down, never overtighten it (use a torque wrench!), and put a little grease for alloy seatposts in alloy frames. Don’t grease carbon: It can degrade the plastic and ruin the frame.