Free clinic at Performance Bike in Rockville. They may have the same type of clinic at their other locations. Check the nearest one to where you live/work.
SPIN DOCTOR CLINIC: DERAILLEUR MADNESS
Thursday, September 13, 2012 at 6:00 p.m.
Our Spin Doctors will provide:
•Expert advice on how to adjust, fix and maintain your derailleurs
•Overview of tools and gear every cyclist should have
Also, 10% off on all Spin Doctor products for those in attendance.