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Frameset SPECIALIZED ROUBAIX SL4 full carbon.
Smoother is faster. The more comfortable and less fatigued you are at the end of a 4-hour ride, the stronger you'll be. Like shocks on a race car, the Zertz vibration damping inserts on the Roubaix SL4 help absorb road impact and keep power planted firmly on the road—couple that with a FACT carbon 8r frame and it's still plenty stiff to thrash around in a sprint.