The Pro2 Trials and Singlespeed hubs are a continuation of the standard Pro2 hubs.

With the main technical specification of the standard hub, the Pro2 Trials and Singlespeed (which are the same hub) have the same 24t 4 pawl configuration - but in an offset design, so that the engagement becomes 48t.
This gives almost instantaneous drive - perfect for trials and decreasing wear and damage caused by the pawls engaging in the ratchet.
The hub also has a specific shortened steel cassette body, which will take up to 6 cogs.