Wilbers Fork Spring - Zero friction - Linear PD Valve We replace the stock linear

We replace the stock linear fork springs with progressive units for improved initial compliance and greater reserve in the second rate

Because the current F-Series uses asymmetrical fork legs

– Durable spherical bearings

Your damping remains just as firm and controlled at the end of a hard twisty run as it was at the start

so this is corrected

Wilbers Fork Spring - Zero friction - Linear PD Valve We replace the stock linearWilbers linear fork springs Linear springs offer predictable, easily adjustable behavior the specialists choice for the racetrack. Built from first class chrome silicon steel and supplied with ABE. Even with linear springs, the air chamber provides end stroke progression. Product may vary from picture. Recommended oil viscosity and air chamber: