The Gen 2 90mm RR (Raised Reversed) stem has 3 main differences in use case than the Gen 1 150mm RR stem.
Firstly it is designed for Enduro riders 5’6” and shorter who want all the benefits of the Gen 1 150mm RR stem at a more proportional size.
Secondly it is for Enduro and Trail riders who want to have great control when going extremely fast while maintaining an exciting and engaging more playful and jib friendly ride.
Thirdly the Gen 2 90mm RR stem fits in to the increasing number of bikes with taller head tubes and stack heights, and taller bars that already have the Raised height built in that the Gen 1 150mm RR stem pushed for but still need the steering and cornering benefits of the Reversed offset.
When riding with the RR stem you will feel how it improves your riding position, the maneuverability of your bike, and the cornering dynamics of your bike with its advanced Reversed offset steering geometry.
The Moderately Raised height:
The Reversed offset: