The height lowering kit by Touratech Suspension. The set includes replacement fork springs and a replacement spring for the shock absorber. This spring set provides you with a sensible -40mm reduction in height without affecting the riding properties - at the expense of a little ground clearance. The progressive springs have been designed to match the BMW F900GS perfectly, and offer a tremendous improvement in response and greater safety in extreme situations. Replacing the front and rear springs will lead to a significant improvement in your suspension system. Street legal.