Street S46 Shock Yamaha 2021 Tracer 9 The STX46 Street Performance Line is based on Öhlins classic monotube design and developed for naked sports bikes, street performance bikes, and Adventure bikes. It features a large 46mm main piston and a gas reservoir that can be within the main body or external using a hose or piggyback mounted reservoir. With adjustable damping, you can change the behavior of the shock to suit your taste and even fit a hydraulic spring pre loader to change the stance of the bike. Depending on the application, the shock absorber features a mechanic or hydraulic preload adjustment as well as adjustable rebound and compression damping. Tech Monotube shock absorber Öhlins well proven design Adjustable rebound damping and compression A range of spring rates available Maintenance possibilities Optional hydraulic spring pre loader Available to a large range of bike models