Wilbers 640 Series Rear Shock | Rebound and Preload Adjustments | F900XR
Wilbers model 640 is a rear shock with:
Three Spring & Knob color choices:
Please note that it is extremely difficult to access the Threaded Preload Adjuster on this model. Therefore it is HIGHLY recommended that this product be purchased with the Hydraulic Preload Adjuster option. The Threaded Preload Adjuster is designed for the rider whose loads do not change and therefore seldom needs to adjust the spring tension on the rear shock.
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