1
Backorder
Specialized

Specialized power cranks ultegra 8000 left upgrade black 172.5

  • Item # 48118-2403
$0.00

Whether you're looking to take your training to the next level or you simply want a better way to measure energy expenditure a power meter is your best bet. And the Power Cranks Ultegra Upgrade Kit are no exception. With our lightweight power sensors on a Shimano Ultegra crankarm it's the perfect way to enter the power meter game.

The development of Power Cranks began with our Human Performance Team looking at riders in realistic scenarios on the bike. Historically power meters have been validated by two different methods—one is by measuring the produced torque by applying a static linear load to a crankarm or chainring while the second uses a power generating motor to pedal the bike. Well cycling is neither static nor linear and humans apply power much differently than a machine. So we found that neither of these methods answer the "real-world" accuracy question.

To get the best test for accuracy in all types of riding scenarios we built our own cycling treadmill the WinMill to measure power output to a known truth. This new benchmark lets us evaluate accuracy under all riding conditions—seated versus standing various power and cadence levels different weights and a myriad of gear. This data acquisition process is our gold-standard for testing power meters and through our testing and external validation from the Locomotion lab in Boulder Colorado Power Cranks have been proven to have the highest accuracy in real world scenarios (+/- 1.5%).

The Power Cranks are also easy to live with with class-leading temperature compensation firmware and waterproof enclosures. Calibration is only required during seasonal-type fluctuations in temperature and the included wrench makes battery swaps a breeze.


  • +/- 1.5% real-world accuracy tested on the WinMill and validated by the Locomotion Lab in Boulder CO.
  • Available in 170-175mm crankarm lengths.
  • Easy set-up and diagnostics with the Specialized Power app. (iOS and Android versions available).
  • Right crankarm and chainring NOT included.
  • Shimano 8000 generation Ultegra left-side power measurement.
  • Works with ANT+ and Bluetooth® devices.
  • "
    SHIPPING
    • Most items from our online catalog ship free on orders $25+
    • Heavier/Larger items that are excluded from our free shipping have a flat rate shipping
    • Expedited shipping is availble. If available in your area, this will be an option at checkout
    • Complete bicycles ship with a flat rate of $75. E-bikes may incur more costs due to weight/size/battery configurations
    • See the delivery FAQs for details on shipping methods, costs and delivery times
    • Local pickup is available on all items at our retail stores. Please note will-call orders are available within 1-2 business day from purchase. You will receive an email stating your order has been fulfilled once it is ready.
    RETURNS AND EXCHANGES
    • Used items, demo bikes, and closeout items are excluded from this policy
    • You may return your purchase within 45 days of purchase
    • Complete bikes (including youth bikes) are not eligible for return
    • All returns must be unopened in new condition upon return. We do not accept returns on open items as we cannot resell them
    • Buyer pays return shipping, unless a mistake was made on the order (i.e. wrong item shipped)
    • Free Exchanges towards any item in our store

    Customer Reviews View on Amazon
     

      out of 5 stars


    5 star
     
    4 star
     
    3 star
     
    2 star
     
    1 star
     


    Customer Reviews View on Amazon
     

      out of 5 stars


    5 star
     
    4 star
     
    3 star
     
    2 star
     
    1 star
     


    Customer Reviews View on Amazon
     

      out of 5 stars


    5 star
     
    4 star
     
    3 star
     
    2 star
     
    1 star
     


    Customer Reviews View on Amazon
     

      out of 5 stars


    5 star
     
    4 star
     
    3 star
     
    2 star
     
    1 star
     


    Customer Reviews View on Amazon
     

      out of 5 stars


    5 star
     
    4 star
     
    3 star
     
    2 star
     
    1 star
     

    BACK TO TOP