SKF Fork Seals YSS this shock is built to

this shock is built to smooth out harsh road imperfections and eliminate unstable mid-corner wallowing

Not so with the Wilbers Type 633 shock absorber — here

Threaded Spring Preload: Easily personalize your suspension setup

and an air-chamber adjustment improve response

and mounting requirements of BMW's front-end architecture

SKF Fork Seals YSS this shock is built toThe SKF green fork seal kit was developed to meet modern mobility demands. Its patented material and unique green finish provide long lasting radial sealing and ultra sensitive fork response. The seal not only prevents leakage but also protects fork tubes and maintains smooth motion over time. Extensively tested in BMW IDM Superbikes, it delivers motorsport grade performance. Each kit includes one dust seal and one oil seal for one fork leg.