Ultegra Di2 R8100: 12-speed electronic only.105 Di2 R7150: 12-speed electronic only.It began life in Japan in 1921 when Shozaburo Shimano decided to start making freewheels in a rented corner of a demolished celluloid factory.įast-forward to today, and it's become so successful that Shimano now accounts for at least half of the global bike components industry. Shimano is the oldest and most widely used of the three main brands. Shimano groupsets: different levels explained There's an explainer of each component and more groupset specifics later in this article. Cassette (the gear sprockets at the rear of the bike).Brake levers/shift levers, usually combined.Bottom bracket (the bearings in the frame on which the crankset spins).When you buy a new bike, a bike brand will often sub in some cheaper parts with a groupset, so you might for example get a crankset that's from a different level or even a different brand from the rest of the groupset. You can buy a complete groupset or the individual components and there's some possibility to mix and match between groupsets, although many items are not inter-compatible. We've also got a guide to gravel bike groupsets for all the details on gearing choices.Ī groupset comprises all the mechanical parts for your bike – so basically everything except the frame, fork, wheels, handlebar, seatpost and saddle. If knobbly tyres are more your thing, we've got a separate guide to mountain bike groupsets. We'll finish by explaining the benefits of the more expensive groupsets and discussing compatibility. We'll start this buyer's guide by explaining the different groupsets available in their hierarchies, then go into greater detail on the individual components and how they differ between brands. ![]() Plenty of companies make bike components, but the market is dominated by three main brands: Shimano, SRAM and Campagnolo.ĭespite the differences between the brands, the components all do the same job, even if there are some subtle variations in how they approach their specific tasks. A road bike groupset is the collection of components that make you stop and go – in other words, the drivetrain, shifters and brakes.
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