White Industries is making the strongest, most-durable freewheels around. This is their newest - the "Dos Eno" - a 2-speed freewheel. This freewheel allows the rider a choice of gearing, without having to switch freewheels. Just loosen the chain, move the chain, and re-tighten! 16/18 teeth, 17/19 teeth - fits standard freewheel threads. Serviceable, re-buildable and BUILT TO LAST! Made in the USA!
White's ratcheting mechanism has 36 teeth in which three pawls engage. Another leading brand has 20 teeth and two pawls ... you do the math!