1ZERO SW: In the ZM2 SL hub, a 6-pawl mechanism is utilized, featuring two sets of three pawls with an offset arrangement. This configuration effectively transforms the 33 teeth of the ratchet ring into an impressive 66 points of engagement. Notably, this mechanism is also utilized in Zipp’s ZR1 road hubs.
1ZERO S: The ZM 900 hub incorporates a 4-pawl mechanism arranged in a 2x2 configuration.
As a result, the 26 teeth on the ratchet rings effectively provide 52 engagement points.