The SKF Glide Kit replaces the stock cartridge rod seals and air divider piston seals on WP forks. The WP fork features many internal seals and 3 of the 6 seals are subject to very high pressures, therefore generating much more seal drag (friction) and stick-slip when compared to conventional forks.
The updated forks benefit from less seal drag (friction) and virtually eliminated stick/slip. The rider will immediately feel better small bump absorption during braking, less arm pump and smoother feel. The reduced friction also allows for better damping, making the forks now more responsive to clicker settings.