Sidi Ergo 4 Carbon Composite Road Shoes Known for their quality, comfort and fit, Sidi shoes are loved by cyclists the world over. The ever popular Ergo has been refined to include a Twelve Carbon Composite sole and Techno-3 Closure System. Light and stiff, The Ergo 4 is suitable for racers and enthusiasts alike To maximise energy transfer, it's important to have a sole that's light and stiff. Sidi's Twelve Carbon Composite sole is made with carbon fibre, injected in a matrix of Nylon. The result is a...