Ratio’s range of kits let you switch up your 11-speed SRAM shifters to run a 12-speed road or even Eagle MTB cassette and who doesn’t want that?

The XPLR cassette uses 13 sprockets to provide a greater range of gear ratios, but still uses a standard 12-speed flat top chain. The Force chain uses chrome-plated inner link plates and rollers ...

Using online gear ratio calculators, a 30c tyre (what is more or less the norm at the moment in the peloton) with a 54x11 would create a development of 10.52 metres, and the very common 32c size ...