There is often a lot of confusion around tender springs and helper springs and the two are often mistaken for one another. Although they have a similar appearance and sit in the same place as each other they do in fact do very different jobs.
Ackermann Steering Geometry In order for a car to turn smoothly, the inside wheel must travel on a smaller radii arc than the outer wheel allowing the car to turn. This is achieved by the inside wheel turning more than the outside wheel. This concept is known as Ackermann steering