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We are closing the De Anza location and are moving to Santa Clara. The remaining inventory will be moved and will reopen on October 31. (Due to internet connection issues) The web site inventory will be corrected to show only what we have in stock, and pick ups will be by appointment. 

Thank all of you wonderful customers for the last 33 years, under my ownership and 69 years in total!

Vance, crew and Daisy (2009-2021)

Shimano Dura-Ace Di2 Rear Derailleur

Shimano Dura-Ace Di2 Rear Derailleur
$849.99
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Details

Put the future of shifting under your control with Shimano's Dura-Ace Di2 electronic rear derailleur. Feather-light cold-forged aluminum and carbon fiber construction offer exceptional weight savings and extreme durability. The Di2 9070 rear derailleur is optimized for Shimano's 11-speed drivetrains, and uses their proprietary E-Tube wiring technology for waterproof connections and simple installation. Sealed pulley bearings ensure smooth operation, and crash protection mode moves the derailleur inward and out of harms way if your bike takes a tumble.

An important part of a rear derailleur's job is keeping the chain taut as you change gears. Chain-wrap capacity is a number that tells whether or not a derailleur will be able to do this on the drivetrain you plan to use it on. Calculate chain-wrap capacity with this formula: Chain-wrap capacity = (large chainring - small chainring) + (large rear cog - small rear cog). Example: 44/29 chainrings and a 11-28 cassette: (44 - 29 = 15) + (28 - 11 = 17) = 32-tooth chain-wrap capacity.

Part Numbers

UPC MPN Store SKU
689228725775 IRD9070SS 210000027300

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