This special edition of Wilbers shock absorber 640 was individually created to fit the BMW-big-enduro (Großenduro) R 100 GS. The 640 for Paralever contains successfully proven technology as a radial piston in a wet run, teflon coated swing points and continuously adjustable preload. Specially developed, the only exception towards more sophisticated models is that it was neither equipped with a piggyback reservoir, nor with adjustable compression settings. Nevertheless, the practical open bleed system, which allows rebound setting adjustment by 22 clicks, is of course included. Due to its ideal reaction characteristics and its long durability, this shock absorber fulfils all wishes.