While automatic gear-shifting for bikes isn't unheard of, such setups typically require batteries that have to be frequently recharged. This is not the case with Shimano's new Q'Auto system, however, ...

The new Shimano Tiagra R4000 groupset answers the demand for budget mechanical with 11 speeds and 105-level ergonomics for just $1,035.

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 ...

Japanese cycling component and accessory brand, Shimano has launched the new Tiagra R4000 Series; a refreshed 2x11-speed ...