Method for determining at least one parameter of the chassis of a steerable vehicle, in which - a normal vector is determined perpendicularly to a wheel plane through which an arc can be described about a steering axis during a steering lock, for a plurality of different steering lock positions, - a steering plane which is parallel to the arc about the steering axis is determined on the basis of the normal vector which is determined for a plurality of different steering lock positions, - a profile of the steering axis can be derived on the basis of the determined steering plane, - caster is determined as an angle between a projection of the steering axis onto a predefinable first plane and a reference axis and/or the king pin inclination is determined as an angle between a projection of the steering axis onto a predefinable second plane and the reference axis, wherein the reference axis is perpendicular to a standardized basic plane, and wherein the first plane is parallel to a longitudinal axis of a vehicle and perpendicular to the standardized basic plane, and wherein the second plane runs parallel to a transverse axis of the vehicle and perpendicular to the standardized basic plane, characterized in that - a predefinable number of normal vector measured values is obtained in each case in order to determine the normal vector for the different steering positions, - two difference vectors (605, 606) are determined for, in each case, three normal vector measured values which are selected by a random principle, - in each case a vector product is calculated on the basis of the difference vectors (605, 606), - the steering plane and/or the steering axis are/is derived on the basis of the vector product, wherein the vector product is perpendicular to the steering plane, and - a mean value or a median is formed on the basis of the determined vector products in order to eliminate measuring errors. - a normal vector is determined perpendicularly to a wheel plane through which an arc can be described about a steering axis during a steering lock, for a plurality of different steering lock positions, - a steering plane which is parallel to the arc about the steering axis is determined on the basis of the normal vector which is determined for a plurality of different steering lock positions, - a profile of the steering axis can be derived on the basis of the determined steering plane, - caster is determined as an angle between a projection of the steering axis onto a predefinable first plane and a reference axis and/or the king pin inclination is determined as an angle between a projection of the steering axis onto a predefinable second plane and the reference axis, wherein the reference axis is perpendicular to a standardized basic plane, and wherein the first plane is parallel to a longitudinal axis of a vehicle and perpendicular to the standardized basic plane, and wherein the second plane runs parallel to a transverse axis of the vehicle and perpendicular to the standardized basic plane, characterized in that - a predefinable number of normal vector measured values is obtained in each case in order to determine the normal vector for the different steering positions, - two difference vectors (605, 606) are determined for, in each case, three normal vector measured values which are selected by a random principle, - in each case a vector product is calculated on the basis of the difference vectors (605, 606), - the steering plane and/or the steering axis are/is derived on the basis of the vector product, wherein the vector product is perpendicular to the steering plane, and - a mean value or a median is formed on the basis of the determined vector products in order to eliminate measuring errors.