The bike industry is full of products that claim to make you faster. Some focus on reducing your aero drag, others trim weight, and some attempt to efficiently transfer the watts from your legs to the road. Many can indeed make you faster, while others perhaps exist because there is profit to be had. Drivetrain efficiency is an interesting and often overlooked opportunity for going faster. A new Shimano Ultegra groupset is said to cost approximately 20W when pedalled at 250W (90rpm)* — in other words, your rear tyre receives 92% of what you put into the pedals. And scarily, that number only gets worse as your power output increases. Fast chain lube and a clean chain can make a measurable difference here, while other upgrades, such as different bearing seals and lubricant can have a more marginal impact, too. 100% efficiency is impossible, but narrowing the gap is not. Retailing from US$500/AU$650 for what’s effectively a carbon fibre derailleur cage and ceramic bearing-equipped aluminium pulley wheels, CeramicSpeed’s OSPW (OverSized Pulley Wheel) system is immediately one of the most polarising speed pursuit upgrades. Many assume it’s the well-marketed ceramic pulley wheel beari...