Main Drive "Reliable Replacement" freewheels are similar to Original Equipment on most new BMX, fixie, and other single speed bicycles. 2 pawls engaging simultaneously every 18°, acceptable for most casual cyclists. Not recommended for motor conversions, jack shafts or high-torque use.
MD Freewheels thread onto standard 1.375"-24tpi hub threads (if you currently have a 16T or larger freewheel, it is most likely compatible). Sprocket pitch is 1/2" x 1/8", compatible with 1/8" wide, single speed chains (3/32" wide chain will not fit).
MD Freewheels feature 4-notch removal, compatible with ACS and other Universal removal tools.
Chrome Plated 18T #63626-1000 Made in China