The new ULTEGRA, which features Shimano's proprietary as well as its latest cutting-edge technologies, was born to realize a smooth and aggressive sport. The DCL, HOLLOWGLIDE outer chainring and the new construction ensure an advanced shifting performance. HOLLOWTECH II design : Optimum balance of lightweight and stiffness New "HOLLOWGLIDE" outer ring : Hollow chainring construction Improved gear for less chain touch in small/ small combination HOLLOWGLIDE outer gear : Hollow construction enjoys great rigidity and stability Double crankset configuration  

• Shimano 2013 Ultegra Bicycle Bottom Bracket - SM-BB6700
• Shimano CS-6700 Ultegra Bicycle Cassette (10-Speed)
• Shimano Ultegra CN-6701 Chain
• Shimano RD-6800-G Ultegra Rear Derailleur
• Shimano Ultegra 6700 Double 10-Speed Shifter/Brake Lever Set