Shock Absorber Type 640 Road Preload Adjuster:Mechanical (X-PA) (+$460) The new “blow-off” compression valve

The new “blow-off” compression valve combines high- and low-speed circuits

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

This prevents oil thinning and cavitation (foaming) during hard

The Wilbers 642 S Competition shock offers the full range of adjustments you expect from a reservoir shock — in a more user-friendly package

Shock Absorber Type 640 Road Preload Adjuster:Mechanical (X-PA) (+$460) The new “blow-off” compression valveThe Wilbers suspension conversion provides a noticeably improved fork response. This is achieved by replacing the stock linear fork springs with progressive ones, allowing for a smoother initial reaction and greater reserve in the second spring rate. The original shock absorber has relatively high rebound damping. In our setup, the spring rate has been slightly increased and both rebound and compression damping optimized. Additionally, the suspension