RDR low-cost, sporty rear shocks. Machined and anodized parts with adjustable dampening at great value for money. Spring rate can easily be adjusted for the rider/scooter weight, and the unit has 10mm of additional height adjustment. For single shock use only. Not for use as a twin shock, as this requires a different setup. This universal shock is available in various lengths. Please check the length of the original item before ordering. Particularly useful for style fans, as the added height adjustment means there is no need for a height adjuster set. Relevant adjustment tool included. Upper mount size: 20mm bush with 10mm internal diameter. lower mount size: 20mm internal diameter with single-sided M8 thread. Delivery includes tool.