The Tiagra cassette’s ratios are reported to be 11, 13, 15, 17, 19, 21, 23, 25, 28, 32 and 36 teeth. For 105, the equivalent 12-speed cassette has 11, 12, 13, 14, 15, 17, 19, 21, 24, 28, 32 and ...

If you’re looking for a mid-range road bike, it’s likely it will come with either a Shimano Ultegra or 105 Di2 groupset. Both of these performance groupsets from Shimano have electronic shifting, ...

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Ok, let's get this out of the way first: We don't usually (or ever) review groupsets. There are a few reasons for this--availability, novelty, and (quite frankly) interest. Also, not a ton of ...

Shimano 105, the component giant's renowned third-tier road group, is undergoing possibly its greatest revamp yet, switching from mechanical to electronic and adding a 12th cog to the cassette for ...

Japanese cycling component and accessory brand, Shimano has launched the new Tiagra R4000 Series; a refreshed 2×11-speed mechanical road groupset created to deliver “confident shifting, practical ...

PEZ readers may remember my Colnago V3 project bike with Ultegra R8000: “The shifting is light, crisp, and sure. Dura Ace is supposed to be better, but I’m not ...

40 years is a long time in technological terms. The first mobile phone was released just shy of 40 years ago, and the distance between the first powered flight and the moon landings was a mere 66 ...