Book excerpt: The BBB-4 Big Blue Book of Bicycle Repair by Calvin Jones is packed with easy-to-follow, step-by-step procedures, color photos and repair tips for keeping almost any road or off-road bike running smoothly and trouble-free. Whether it's repairing a flat tire, adjusting brakes and shifting systems, truing wheels, or maintaining hub, headset and bottom bracket bearing systems, the BBB-4 has you covered. Thoroughly researched and revised, the 4th edition of the Big Blue Book contains updated photos, torque specifications and troubleshooting tables, along with new content on wheel building, electronic shifting, 12-speed and 1X drivetrains, tubeless tires, disc brakes, headset and bottom bracket standards, and more. Truly an indispensable tool and reference source for both the novice and advanced bicycle mechanic.