Polini Sport Rear Shock Absorber Set Vespa GTS, GTV (All Models)Polini Sport Rear Shock Absorber Set Vespa GTS, GTV (All Models) The Polini shock absorbers for Vespa GTS and GTV (all models) provide superior stability and control while turning and braking due to their rigid setting and adjustable spring load. These hydraulic shock absorbers offer a balanced and safe driving experience. The included double key allows for easy adjustment of the spring preload for added comfort while riding with a passenger onboard.