Over the past three decades the number of sprockets on a bicycle cassette has grown from six, to seven, to eight, nine, 10, and 11.
But the trend for more sprockets shows no sign of stopping, with SRAM releasing its 12-speed Eagle groupset for mountain bikes in 2017, and Campagnolo now preparing to launch its first 12-speed groupset for road bikes, according to a patent filed in the United States.
More cogs in a cassette means less front shifting (or none at all) and smaller jumps between gears to ensure smooth pedalling. But there are compromises to be made.
Pros and cons
Despite manufacturers reducing the physical width of the sprockets on the cassette, the gaps between them and the width of the chain, the width of the cassette has…