Shimano Single-speed freewheel SF-MX30-N

Style BMX freewheel for single-speed use. For standard single-speed hubs with 1.37 thread x 24 TPI. Available in 16, 17 or 18-tooth versions. Compatible with 1/8" or 3/32" chains. 177g (17t).

Product weight specified is an approximate weight based on manufacturer's specifications (where available) or our measurement of one or two examples. For most products, weight generally varies from 5% to 10%.