A stabilizer (1) serves for stabilizing a link of athree-point suspension system of an agriculturaltractor. The stabilizer (1) has at least one telescope(8) consisting of a tube (5) and a piston (6) helddisplaceably therein. Said tube and piston are coupledelastically by at least one spring (7). The piston (6)is designed such that it can be adjusted in length bymeans of at least one thread (12, 13). In order toretain the telescope (8), the stabilizer has at leastone pivotably held retaining clip (15). In a retainingposition, said retaining clip (15) engages over anabutment (17) of the piston (6) whereas, in a releaseposition of the retaining clip (15), the piston (6) canbe freely moved. In order to obtain simplehandleability of said stabilizer (1), the abutment (17)is formed by at least one substantially rotationallysymmetrical disc. The piston length can therefore beadjusted in or in the vicinity of the retainingposition.
