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Threaded Spring Preload: Achieve the perfect race sag with the high-strength threaded collar
proven across many BMW models
Spring preload is continuously adjustable for riding with a passenger or luggage — manually or
riding style
Wilbers Fork Spring - Zero friction - Progressive Lift & Lowering Kits Threaded Spring Preload: Achieve theWilbers 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:
