Vibration analysis leads to improved cycle performance on cobbles

| Transport

Vibration analysis of bicycles on cobbles

Jaguar and Pinarello have applied vibration analysis and aerodynamic innovations to design a racing bike that can beat the competition over the rigours of cobbled street surfaces.

An understanding of vibration, suspension dynamics and bicycle frame design combined with the experience of decades of vehicle manufacturing and cycle design has led to a racing bike innovation which improves performance on rough terrain by almost 5%.

The innovation came as a result of a partnership between vehicle manufacturer Jaguar and cycling Team Sky by co-engineering the world’s first bespoke bicycle for hugely challenging terrains with bicycle manufacturing experts, Pinarello.

The Pinarello DOGMA K8-S bicycle, which all eight Team Sky riders will debut at the Tour of Flanders on Sunday 5th April, possesses a new lightweight suspension system (DSS 1.0, Dogma Suspension System) and flexible flat carbon chain stays to create a pioneering suspension pivot in the rear triangle to ensure perfect riding comfort over rough terrain.

Pinarello’s priority was to create an innovative frame that could improve rider isolation from the challenging road surfaces and help reduce rider fatigue.

Taking key insights from the pioneering aerodynamics & technology work on the DOGMA F8, the first collaborative project for Jaguar, Pinarello and Team Sky, Jaguar’s engineers applied their advanced aerodynamics knowledge and experience in ride and vibration analysis, to help create an overall performance increase of 4.6% and 50% improved comfort for the riders over rough terrain from the previous DOGMA K model.

“The Pinarello DOGMA K8-S looks as good as the DOGMA F8 and from the moment you get on it, you realise the difference straight away, especially on the cobbles,” said Team Sky’s Sir Bradley Wiggins.

The reigning UCI World Time Trial Champion added: “I’ve never ridden anything like it on cobbles before, which is the most extreme terrain you can ride a bike on. The way it feels, its aerodynamics, stiffness and improved flex in the rear is game-changing for cycling.

Fausto Pinarello, CEO of Pinarello, said: “The DOGMA K8-S could reshape the world of road racing. The DOGMA K8-S absorbs only the necessary shocks of the road to allow you to keep pedalling regularly with optimum power and precision. It is the perfect bike for the cobbles.”

The DOGMA K8-S has been subjected to several months of laboratory and practical tests using accelerometers, powermeters and GPS instrumentation, to ensure rider safety and performance efficiency of the new frame.

In March, Sir Bradley Wiggins and Christian Knees tackled the long and regular cobble sectors on the last 130km of the Paris-Roubaix route, where comparative tests were undertaken with the previous DOGMA K frame.

“The experience Jaguar has developing vehicles over widely varying surfaces across the world has helped us to understand what may be required for cobbled surfaces,” said Tim Donovan, Vehicle Dynamics at Jaguar Land Rover.

Donovan added: “I am a keen amateur cyclist and have ridden my own classic Pinarello over many of the famous cobbled surfaces raced in the Spring Classics, so I know first-hand how challenging they are. I remember watching Ian Stannard win Omloop Het Nieuswblad in the rain in 2014 and again in 2015, so to work with him and the other Sky riders at these mythical locations was a wonderful experience.”

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