Varies according to dropout thickness - cheap stamped steel dropouts are about half as thick as alloy dropouts. You need an axle of about 150mm + twice the dropout thickness. Most proper track hubs are shorter than this, because having the axle protruding through the track nuts creates a hazard for you and other riders, particularly in a crash.
Varies according to dropout thickness - cheap stamped steel dropouts are about half as thick as alloy dropouts. You need an axle of about 150mm + twice the dropout thickness. Most proper track hubs are shorter than this, because having the axle protruding through the track nuts creates a hazard for you and other riders, particularly in a crash.