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 Made in China

SKU 21FW05MD18
Brand ACS BMX
Shipping Weight 0.2200kg
Shipping Width 0.090m
Shipping Height 0.090m
Shipping Length 0.010m

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