INTRODUCING THE NEW
PROJECT321 DRIVE SYSTEM
Effective immediately all Project321 rear hubs will be equipped with our new magnetically actuated, 6 pawl, ratchet drive system. This new system gives you a combination of options and features like no other drive system on the market.
By using magnets as a pull spring (opposed to mechanical or magnetic push springs) to move pawls into the drive ring, we are able to achieve less drag and less noise than other high speed ratchet mechanisms. By using magnets in this configuration the pawl force against the drive ring is at its strongest when the pawl is fully engaged. As the pawl climbs the drive ring teeth during freewheeling the force (and friction) is reduced as the pawl magnets get farther away from the drive ring. This is the exact opposite of traditional mechanical push springs where the weakest point of the spring is at full engagement and the spring force gets stronger (creating more friction and drag) as the pawl is pushed up over the drive ring teeth during free wheeling.
By carefully placing the correct strength magnet in the precise location it gives us plenty of force to quickly move the pawl into location as it clears a tooth but minimizes drag and friction during free wheeling. It seems like a small detail that wouldn’t amount to much but our test numbers are showing a substantial decrease in drag. Read below for more detail on the benefits of this new system.
Drivers are in stock and shipping on all new hubs.