Shock Absorber Type 644 WESA Dynamic Rear Lift/Lowering:Std The only difference is that

The only difference is that it omits the compression reservoir and thus the option to adjust high- and low-speed compression

resulting in a significantly better initial response and providing more reserve in the second spring rate compared to the stock setup

the bike quickly returns to its defined ride height as the shock’s internal stroke pumps oil into the cylinder

Sitting a tier above the emulsion RZ-series

Shock Absorber Type 644 WESA Dynamic Rear Lift/Lowering:Std The only difference is thatWESA Dynamic with manual compression fine tuning. BMWs Dynamic ESA adapts to conditions in real time. We go further by tailoring damping to your weight, load, and usage and, where equipped with an external reservoir, adding manual high low speed compression adjusters for additional fine tuning. Shock length can be specified to realize raise lower requests, resulting in a fully bespoke setup. See the menu below for the available raise lower options for