Professional cycling has, in its recent history, been prone to a shocking variety of cheating methods and dirty tricks. Performance-enhancing drugs. Tacks strewn on race courses. Even stealthy motors ...

Then at the end of June, Shimano launched a new rear derailleur and shifter that centred around a new wireless rear derailleur, which borrowed from the brand's latest MTB tech, as well as a new RX825 ...