Pro Vibe Sprint Cavendish Star Series Carbon Stem
The Shimano Pro Vibe Sprint Cavendish Star Series Carbon Stem is everything you'd expect a sprinter's stem to be. Like the man himself, the Cavendish stem is designed a singular purpose - to sprint.
The Vibe Sprint stem is twice as stiff as the already stiff Vibe 7s stems in all directions. The stem is a monocoque carbon mold and includes a front plate design that resists flexing torsionally. The carbon molds around an alloy sleeve to maximize contact with the steerer tube. The Sprint stem also includes its own matching top cap that is designed to look like part of the stem.
If you want the stiffest possible stem, the Pro Vibe Sprint Stem is it.