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. Just ask four time Paris-Roubaix champion Tom Boonen.
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Frame:
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Specialized SL4 FACT 10r carbon, FACT construction, tapered/shaped 1-1/8" to size-specific lower headtube, compact race design, Zertz, internal cable routing, carbon OSBB
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Fork:
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Specialized Roubaix FACT carbon full monocoque, Zertz, size-specific
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Front Derailleur:
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Shimano Ultegra Di2, braze-on, 11-speed
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Rear Derailleur:
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Shimano Ultegra Di2, 11-speed
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Number of Gears:
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22
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Shifters:
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Shimano Di2 STI, 11-speed
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Chainset:
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FSA SL-K Light, carbon, BB30
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Chainrings:
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50/34T
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Bottom Bracket:
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OS integrated, sealed bearings
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Cassette:
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Shimano Ultegra, 11-speed, 11-32
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Chain:
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Shimano Ultegra, 11-speed
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Pedals:
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Nylon flat test ride, loose ball, w/ reflectors
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Brakeset:
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Shimano, hydraulic
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Brake Levers:
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Shimano, hydraulic lever
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Handlebars:
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Specialized Expert Shallow Bend, alloy, 123mm drop, 75mm reach
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Stem:
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Specialized Expert Pro-Set, 3D forged aluminium, 4-position adjustable, 4-bolt, 31.8mm
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Headset:
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1-1/8" upper and size specific lower, stainless steel cartridge bearings, 20mm carbon cone spacer, w/ 20mm of carbon spacers
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Grips:
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Specialized Roubaix, w/ 2.5 gel pads
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Wheelset:
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AXIS 4.0 Disc
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Front Tyre:
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Specialized Roubaix Pro, 120TPI, foldable aramid bead, BlackBelt protection, 700×23/25c
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Rear Tyre:
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Specialized Roubaix Pro, 120TPI, foldable aramid bead, BlackBelt protection, 700×23/25c
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Tubes:
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Standard presta valve
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Saddle:
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Body Geometry Romin Expert Gel, hollow Ti rails, 143mm
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Seatpost:
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S-Works CG-R, FACT carbon w/ Zertz, 27.2mm
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Seat Binder:
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Forged alloy, Ti bolt, 32.6mm
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Weight:
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Not Specified