My message Close
With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.
Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!
With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.
So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.
Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.
The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.
Season:2024
Brand:Specialized
Code:48119-2114
And the power cranks 105 upgrade kit is no exception. With the lightweight power sensor on a Shimano 105 crankarm it's the perfect way to enter the power meter game.
The development of power cranks began with the human performance team looking at riders in realistic scenarios on the bike. Historically power meters have been validated by two different methodsone 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. It was 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 Specialized built their 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 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.