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Rolling Thunder technology evenly spaces the load beneath the Grip Shift when rotating
Aerodynamic design
The new EPS(TM) V2 Power Unit is an improvement with regards to aerodynamics
Headset: Look tapered integrated 1 inch 1/2 down
Shimano Ultegra FC-6650 SL Compact Chainset - 50 / 34t - 170mm Crank Arm Discipline_MTB Rolling Thunder technology evenly spacesShimano Ultegra FC 6650 SL Compact Chainset 50 34t 170mm Crank Arm Ultegra SL, noticeably visually different to the standard Ultegra and invisibly Technically different. Ice grey in colour and Super Light in nature, SL is here! The most visible change comes with the colour of the crankset, but whats not immediately apparant is the weight loss and performance gain. The performance improvement is largely due to the lighter, stiffer, machined steel
