Wilbers 641 Racing Shock Absorber with Separate Reservoir + Hydraulic Preload Adjuster Knob

The Rieju Power Parts catalog includes the rear shock absorber Wilbers model 641. It is the top of the range.

It features a 46 mm diameter internal piston, valved specifically for each customer, with the optimal spring stiffness for the weight of each rider. The shock absorber is fully customized.

It includes a radial piston, high-quality shims, extra hard shaft, separate nitrogen reservoir with external compression adjustments for high (automatic) and low speed, rebound speed adjustment, and preload via notched ring and lock ring (adjustment key included as standard).

The spring color can be chosen in black or navy blue. Or, at the customer's express request, with the spring color of their choice.

In the case of the Wilbers 641 + HPA model, the rider can quickly, easily, and comfortably adjust the tension (preload) of the rear shock absorber spring to adapt it to changes in weight or load on the bike (passenger, panniers, luggage, tank bags, etc.)

After purchase, the customer is contacted to define the shock absorber according to their specifications.