Sorry! Specialized Power Cranks €“ Shimano Ultegra Upgrade Kit is no longer available.

Specialized Power Cranks €“ Shimano Ultegra Upgrade Kit

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Colour: Black

If you're a cyclist seeking to elevate your performance or you're just after a precise way to gauge your energy expenditure, a power meter is the tool for you. The Power Cranks Shimano Ultegra Upgrade Kit from Specialized features our advanced, lightweight power sensors fixed onto a Shimano Ultegra crankarm, offering an ideal introduction to power meter usage.

Our Human Performance Team initiated the development of Power Cranks by examining cyclists in various plausible riding scenarios. Traditional power meters have been verified using two methods - one involved the measurement of the produced torque by applying a static, linear load on a crankarm or chainring, while the other required the use of a power-generating motor to pedal the bike. As cycling is neither static nor linear and power application by humans significantly differs from machines, we discovered that neither technique sufficiently addressed the issue of real-world accuracy.

We developed our proprietary cycling treadmill, the WinMill to accurately measure power output. Recommended for all riding conditions including seated versus standing, diverse power and cadence levels, varying weights and a wide range of gear, this new benchmark enables us to comprehensively evaluate accuracy. Our meticulous testing process and external validation from the Locomotion lab in Boulder, Colorado has proven that the Power Cranks have unmatched accuracy in real-world scenarios, boasting a rating of +/- 1.5%.

Not stopping at performance, we've ensured that Power Cranks are user-friendly with top-rated temperature compensation firmware and waterproof enclosures. They need calibration only for major temperature fluctuations and the complimentary wrench makes battery replacements easy.


Key Features:

  • +/- 1.5% real-world accuracy, tested and affirmed by the WinMill and the Locomotion Lab in Boulder, CO.
  • Compatible with ANT+ and Bluetooth® devices.
  • Easy installation and diagnostics with the Specialized Power app. (Available for both iOS and Android).
  • Left-side power measurement with the Shimano 8000 generation Ultegra.
  • Please note: right crankarm and chainring are NOT included.

More reasons to buy from us

We price match all products on a like for like basis.

To qualify the item must be available in stock with a UK supplier and any additional costs taken into consideration.

i.e delivery charges, buyers premium, assembly charges.

Call us on 01823 252499 before you make your purchase to enquire about price matching a product.

Please read our full price match policy.

With all bike sales you will receive an informational bike pack that contains a 15% Off accessories voucher inside.

This voucher is redeemable at your nearest Bicycle Chain, Rock & Road or Climb On Bikes Store.

We currently have stores in Yeovil, Taunton, Bridgwater, Weston-Super-Mare and Hereford.

This is part of our 'Support Local Business' initiative, where we want to see local riders supported by their local bike shops.

We hope to see you in store soon.

When you buy a bike from us in the store or come to collect your Click & Collect order we will adjust your new bike to fit you.

This includes adjusting saddle height, saddle position and where possible adjusting the brake levers / gear shifters.

We will also adjust any accessories you have purchased with your bike where applicable.

When you buy a bike from us you will get a free service at your nearest Bicycle Chain store within 6 weeks of taking delivery of your bike.

The free service is put in place to make sure the bike you have purchased is running correctly and to adjust out any cable stretch that happens to any new bike.

The type of bike you have bought and the type of riding you have planned will affect how soon you need to book your free service.

  • Light use - 6 weeks
  • Daily commuting / moderate use - 4 weeks
  • Hard / aggressive use - After the first 2 rides

However if you experience any issues at any time you should stop riding your bike and book your bike in for its free service immediately.

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