S-Works Tarmac SL2 – Specialized

FACT CRANK & BOTTOM BRACKET1800Unmatched Stiffness; Unparalleled Shifting Efficiency1600Redesigned to help fast finishers find the finish line first,the new-for-2008 version of 1400 the S-Works FACT carboncrank is even stiffer (it was already the stiffest on the1200market) and better shifting than the original version. We've(lbf/inch/Kg)2000improved its stiffness by giving 1000 the crankarm a moreefficient 'D' shape, upgrading the coupling system that links800the two arms together and enhancing the design of the spider.We've improved shifting 600 performance by refining toothprofiles, reengineering the spider and adding a400proprietary 3-19 Ni Boron plating to the chainrings.200CRANK SYSTEM WEIGHTED STIFFNESS COMPARISONSpecialized S-Works, 1793Further boosting the SL2's performance out on the road0and in our lab is the bike's fully integrated bottom Cranks Tested bracket. Rotated 45° Down From Parrallel and BB Tilted 16°Because we control the design of the entire chassis, wewere able to create a larger diameter bottom bracket shelland house a pair of large diameter bearings directly in theframe. We were also able to employ a dramaticallyoversized two-piece bottom bracket spindle, one that savesweight and boosts efficiency under peak loads.Cannondale Hollowgram SL, 1701Time ASX Titan Carbon, 1372Shimano Dura Ace, 1273Campagnolo Record UT, 1223CRANK & BB SYSTEM WEIGHT DATACrank System (53/39, 172.5mm)Weight(g)Specialized FACT Crank system, 2008 623Time ASX Titan Carbon, 2007 632Cannondale Hollowgram SI, 2007 668Campy Record UT, 2007 695Shimano Dura Ace, 2007 750Note: New 2008 Specialized FACT CRANK & BB is 9% Stiffer than 2007 version2000CRANK SYSTEM WEIGHTED STIFFNESS COMPARISON1800(lbf/inch/Kg)1600140012001000800600400200Specialized S-Works, 1793Cannondale Hollowgram SL, 1701Time ASX Titan Carbon, 1372Shimano Dura Ace, 1273Campagnolo Record UT, 12230Cranks Tested Rotated 45° Down From Parrallel and BB Tilted 16°10* See notes on testing on page 7811