Ultegra Fc 6600 6603 Bb Inner Cvr O Ring

• Does not have O-rings
  

Shimano Ultegra ST-6600 Triple Shifters/Road Caliper Brake Levers

• Cables, housing, and housing stops included
• Triple front, ten-speed rear shifting
• Compatible with SM-SC70 10-speed Flight Deck harness
• Stainless steel inner cables and Shimano SLR housing

Ultegra front derailleur designed for 10 speed drivetrainswith a triple crank up front. The wide-link design offers 20% increased rigidityfor better shifting and compatiblity with 10-speed specific cranksets.

The new 6600 Ultegra group now incorporates the Dura-Ace-style Hollowtech II outboard bearing integrated spindle design. This kit includes both crankarms, rings, and spindle. (Please see item# BB603E00 for bearing cups). The Hollowtech II design delivers massive improvements in stiffness, durability, and weight savings. SG-X chainrings deliver smooth upshifts, even under power.

6603 version incorporates a triple ring that's perfect if you live in very hilly terrain, do loaded touring, etc. Installation wrench sold separately

The new Ultegra 6600 series dual control levers offer Dura-Ace-inspiredstyling and function. The refined hood fits the hand better, while the shiftlevers now move in a more ergonomic, arced stroke. The entire grip is now 5mmsmaller in circumference, allowing it to fit more hand sizes. Designed specificallyto handle 10 speed rear drivetrains (specify double or triple for left sideshifter).

• Item includes left and right shifter/brake levers (enough for one bike).

The new Ultegra 6600 hubs offer compatibility with boththe new 10 speed cogs, as well as older 9 speed cogs. Both hubs utilize smoothrolling loose ball bearings with super-high polished races and internal greasesleeves to maintain and increase service life as well as extend performance.

• Front hub is now Shimano-approved for radial lacing
• Rear hubs works with 9 or 10 speed cassettes