Tested extensively by the Dutch National BMX Team, Damien Godet, Kory Cook, and numerous other elite racers, Box Two™ Freewheels combine durability with lightning-fast engagement. They feature nine, super durable pawls and are available in one of three choices -- 16, 17 or 18 teeth. To install, use the Park Tools™ FR-6 or other installation tool designed for single speed freewheels with four notches that are approximately 32mm across measured inside to inside and 40mm outside to outside. FEATURES 1/8th or 3/32 Chain Compatible ED Black Protection 108 Points of Engagement 9 Pawls Engagement System Heat-Treated Chromoly SPECIFICATIONS Material Chromoly Chain 1/8" or 3/32" Hub Thread 1.375 x 24 TPI Engagement 3.3° [108 clicks] Finish Nickel Plate ED Finish Weight [16T] 163 grams / 5.75 ounces Weight [17T] 170 grams / 5.99 ounces Weight [18T] 176 grams / 6.21 ounces
