Wilbers Fork Spring - Zero friction - Progressive Fork Upgrade Kit We replace the fork’s linear

We replace the fork’s linear springs with progressive units for better initial compliance and more support later in the stroke

Designed for cost-conscious riders

KTM 890 Duke / 890 Duke L – Sharper Response

Ready to take your suspension performance to the absolute limit

Threaded Spring Preload: Easily adjust front-end sag via the fine-threaded collar system to properly balance your chassis based on heavy luggage

Wilbers Fork Spring - Zero friction - Progressive Fork Upgrade Kit We replace the fork’s linearWilbers progressive fork springs ZERO Friction finishing Our vibratory finishing process (trough vibrator with tailored media) micro polishes the spring surface. The resulting fine, shiny finish reduces surface roughness and friction hence ZERO Friction. Pair with our specially formulated Wilbers fork oil and the specified air chamber for your vehicle to maximize performance. Product may differ from the picture. Recommended viscosity and air chamber: