Profile Racing's Cassette Drivers are what makes these cassette hubs so great. Their 4 pawl design ensures that at least 2 pawls are engaged at all times, meaning that when you apply power to the pedals, it is instantly transformed into power at the rear wheel, unlike lesser hubs that take a quarter to a half a crank's worth of rotation to engage.
•Compatible with Profile Mini Hubs, Totem Hubs, High Flange hubs, Madera V2 Cassette Hubs, and Classic MTB Single Speed Hubs.
*Pawls and springs not included*
**Cog, lockring, and spacer not included with cassette driver**