RockShox CSU 2-Step/SoloAir/Coil/Dual Position Totem 10-13 Tapered Black Crown:

RockShox Totem heavy duty and durable steerer replacement CSU assembly. Made of aluminium. Spring type: 2-Step, SoloAir, Coil, Dual Position. Tapered steerer. Easy to fit. Comes with black crown.

2-Step Air allows riders to shorten their fork to a minimal travel setting (45 mm less travel) for easier climbing or extend the travel all the way for maximum downhill performance.

Dual Position Air changes your fork