Specialized Tarmac SL4 Pro Di2 Bike - 2012

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 Pro model has even higher stiffness-to-weight than last year's industry-leading SL3 frame, and features new Di2 electronic shifting for immediate, spot-on shifting, plus Roval Fusée SL wheels. Specialized Pro FACT carbon crankset with OSBB and removable spider has outstanding strength-to-weight ratio for superior power transfer, plus new Shimano Di2 electronic group for state-of-the-art performance1-1/8" to 1-3/8" steel headset with Cr-Mo cartridge bearings is low-maintenance, smooth, and durable, plus 8mm carbon cone and 20mm of carbon spacersAdjustable four-position oversized alloy stem with 31.8mm bar clamp for strength and versatile positioningPro FACT carbon seatpost is super light and stiff for optimal power transfer during all-out seated effortsPro FACT carbon seatpost is super light and stiff for optimal power transfer during all-out seated effortsPro FACT carbon seatpost is super light and stiff for optimal power transfer during all-out seated efforts1-1/8" to 1-3/8" steel headset with Cr-Mo cartridge bearings is low-maintenance, smooth, and durable, plus 8mm carbon cone and 20mm of carbon spacersPro FACT carbon seatpost is super light and stiff for optimal power transfer during all-out seated efforts