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Premium Lightweight Build: CNC-machined aluminum body components offer exceptional strength
Whether you are restoring a vintage dirt bike for show or competing in vintage MX racing
Promoto tubes match OEM dimensions precisely and can save up to 50% versus original parts
We move from linear to progressive fork springs for a livelier initial stroke and more reserve in the second rate
Wilbers Fork Spring - Zero friction - Progressive Fork Springs Premium Lightweight Build: CNC-machined aluminumWilbers 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:
