New design approach for leaf-springs in motorcycles

Abstract

A leaf spring is a very simple type of mechanical spring which is commonly used for heavy duty suspension systems. In single-track vehicles, such as motorcycles or bicycles, the coil and air spring are most widespread as well as current state of the art. However, the application of a leaf spring is nothing new on these types of vehicles. Various design approaches can be admired in museums. A century ago, it was even more common than the coil spring, but history shows us that this spring system has gradually been replaced due to its inherent disadvantages. So why should we deal with it again now? Because we believe that the leaf spring is not yet old news and has the potential to improve current vehicles. In this document, we want to introduce an alternative leaf spring design and the associated benefits. One that at the core is old and simple in form but utilizes new approaches and technologies to meet the demands of modern motorcycle and improve riding behavior.