Lennard Zinn was a member of the U.S. national racing team and has been riding and fixing bikes for more than 50 years. A professional frame builder and bike designer, Lennard is also the technical writer for Velo magazine and hosts the popular Q&A column on VeloNews.com. His other books include Zinn & the Art of Mountain Bike Maintenance, Zinn & the Art of Triathlon Bikes, Zinn's Cycling Primer, The Mountain Bike Performance Handbook, and The Mountain Bike Owner's Manual. He lives and works in Boulder, Colorado.