Shock Absorber Type 640 Road Preload Adjuster:Mechanical (X-PA) (+$460) the Blueline is available at

the Blueline is available at no additional cost

but gives more damping as the moving speeds get higher

The stereo alternative with the same Wilbers DNA: stepless preload adjustment

New Top Cap with EVO design

Nonetheless

Shock Absorber Type 640 Road Preload Adjuster:Mechanical (X-PA) (+$460) the Blueline is available atThe basic edition of the Wilbers Adjustline mono shock absorber features the same advanced technology as the more complex versions. The only difference is the omission of the compression reservoir, and therefore the ability to adjust high and low speed compression. Despite this, the shock absorber makes no compromises in terms of response behavior or durability. Its radial piston design, wet run operation, and Teflon guided self aligning bearings