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 10r frame and it's still plenty stiff to thrash around in a sprint. Bike is currently for sale for $2600. Original price $3999.95. Please call 802-658-3313 for rental availability.