This is recommended every 6 months. Makes your bike WORK BETTER.

We check all bearings for play check all bolts for tightness, adjust/lube your cables, lightly true your wheels, lube your chain and all pivots (derailleur pulleys and pivot points), center your brake pads to stop them from rubbing on your rim. Finally we air up your tires, and wipe your greasy steed down. 

Plus, you can add an overhaul of both hubs to any tuneup for only $40 extra.  That'll save you money right then and there!