The Rear Suspension Equilibrium

This chapter aims at defining the equations that govern the rear suspension in term of the overall equilibrium and loads applied for different conditions of the motorbike motion. The formulae are useful for designing a rear suspension made by a unique arm which connects the frame pin with the wheel axle. The equations are non-linear and implicit so that they can be solved by recursive methods applicable in a calc sheet. The mathematical models can be applied to different types of rear suspension but they are developed for the peculiar case of those equipped with an articulated mechanism which leads to a progressive stiffness of a single arm rear suspension.