This spring shock absorber is the perfect enhancement to any value.It will greatly improve the driving, handling and safety of your bikes.<br/>Features:<br />Relieves the impact of the road surface,quickly absorbs the vibration generated by the bumps,and restores the bikes to smoother cycling state.<br />Gives you smoother cycling and better amping management.<br />2 system adjustments&#xff1a;Rebound &amp; Preload.<br />Premium aluminum alloy body and steel coil spring.<br />Commonly used on downhill bicycles,mountain bikes and electric scooters.<br/>Specification:<br />Length(eye to eye): 125mm / 150mm / 165mm / 190mm (optional)<br />Material: Aluminum alloy &#43; Steel<br/>Length<br /> (eye to eye)<br /> 125mm<br /> 150mm<br /> 165mm<br /> 190mm<br/>Spring Rate<br /> 550lbs<br /> 650lbs<br /> 650lbs<br /> 650lbs<br/>Storke Length<br /> 18mm<br /> 30mm<br /> 38mm<br /> 50mm<br/>Spring Length<br /> 57mm<br /> 82mm<br /> 93mm<br /> 115mm<br/>Spring Outer Diameter<br /> 46mm<br /> 46mm<br /> 46mm<br /> 46mm<br/>Installation Aperture<br /> 8mm<br /> 8mm<br /> 8mm<br /> 8mm<br/>Top/Bottom Bushing Length<br /> 24mm<br /> 24mm<br /> 24mm<br /> 24mm<br/>Weight<br /> 356g<br /> 478g<br /> 506g<br /> 664g<br/>Package List:<br />1* Spring Shock Absorber<br />4* Screw