Specialized Tarmac Expert SL4 Di2 Road Bike 2013

Whether it's winning the Tour de France or a city-limit sprint, the next generation of Tarmac—the SL4—was born to race, with head-snapping acceleration and razor-sharp handling. The Expert model has even higher stiffness-to-weight than last year's industry-leading SL3 frame, and features new Ui2 electronic shifting for immediate, spot-on shifting, plus DT Axis 4.0 wheels.

• Specialized SL4 FACT IS 10r carbon frame with uniquely shaped, tapered head tube and OSBB: now even stiffer and lighter for pure, unbridled speed and power
• Full monocoque FACT carbon fork with a tapered carbon steerer is super light with great torsional rigidity for high-speed handling
• Specialized Turbo Elite 100 TPI, offers BlackBelt protection for a tough tyre that still offers low rolling resistance, great traction, and light weight to allow for quick climps and fast descents
• Adjustable 4-position oversized alloy stem with carbon-clip front cone plus 31.8mm bar clamp for strength and versatile positioning
• FSA SL-K Light carbon BB30 crank is stiff and light for excellent power transfer
• 1-1/8" to 1-3/8" headset with sealed, Cr-Mo bearings ensures precision, low maintenance, and lighter weight; with 20mm of carbon spacers
• FACT carbon Comp seatpost absorb road vibrations and is stiff and efficient; paired with comfortable, high-performance BG Toupe Comp saddle with flat profile and Cr-Mo rails

Frame: Specialized FACT 10r carbon, FACT IS construction, tapered/shaped HT, compact race design, 1-3/8" lower bearing, OSBB

Fork: Specialized FACT carbon, full monocoque, OS race for 1-3/8" bearing

Bottom Bracket: OS integrated, sealed bearings

Brakes: Shimano Ultegra

Cassette: Shimano Tiagra, 10-speed, 11-28

Chain: Shimano Tiagra 10-speed

Chainset: FSA SL-K Light, carbon, BB30

Front Derailleur: Shimano Ultegra Di2

Handlebar Tape: Specialized Pro D2

Handlebar: Specialized Tarmac Expert, 2014 alloy

Headset: 1-1/8" upper and 1-3/8" lower Cr-Mo cartridge bearings, w/ 8mm carbon cone spacer and 20mm of carbon spacers

Pedals: Nylon flat test ride, loose ball, w/ reflectors

Rear Derailleur: Shimano Ultegra Di2

Saddle: BodyGeometry Toupé Comp, hollow Cr-Mo rails, 143mm

Seatpost: Specialized Comp, FACT carbon, 27.2mm

Seat Binder: Forged alloy, 32.6mm

Shifters: Shimano Ultegra Di2 STI

Stem: Specialized Comp-Set 6061 alloy, cone head bolt, 12-degree, 4-degree shim, 31.8mm

Tyres: Specialized Turbo Elite, BlackBelt, 100TPI, aramid bead, 700x23c

Tubes: Lightweight, presta

Wheels: DT Axis 4.0