The Park Tool School is a hands-on maintenance and repair clinic written by Park Tool and taught by the experts at Zack's Performance Bikes. Learn how your bike works, how to change a flat or overhaul your bike completely. Clinic curriculum and materials originate from the BBB-4 Big Blue Book of Bicycle Repair, which will be provided for you for every class this book acts as the outline for each clinic. Check our calendar for available classes and times. Classes will be available from August through December.