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Lotus E21 - revised brake ducts and drums 06 July 2013

Lotus are running a totally different rear brake duct layout in Germany, with novel new drums that are totally enclosed on the outside. This means that rather than spilling the hot air from the brakes on to the outside of the wheel as is conventional, it is expelled towards the inside upper half of the wheel rim (red arrows). This is designed to improve the diffuser's efficiency.