Nitrogen pressurized shock absorbers, with separate tank (piggy-back), especially studied and developed for rear axle of Vespa scooters. The shock absorber body and the rod are made of high resistance treated steel, with upper and lower attachments in aluminium alloy. Adjustments: - Spring preload, with the micrometric alluminium ring - compression clicking knob, on the separate tank. Available for all the models of - Piaggio Vespa scooters (air - cooled engine version), from 50 to 200 cc, disc brake models included.
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