Shimano Dura-Ace FC-R9100-P Power Meter Crankset. Using a powermeter has been a revelation in training over the past 10 or so years.Compared to using a heart rate monitor, wattage as a metric is more specific to the effort and removes many variables that could disrupt proper training on a given ride. Of course, these numbers are only as good as the device they are coming from and knowing the precision that Shimano instills on its premium products, we know the power measurement readings are up to the accuracy that professional cyclists demand. The unit itself is very small with a strain gauge inside the spindle, a couple of sensors on the backside of each crankarm for true dual-sided power reading, and an antenna/charging port sending and receiving Bluetooth LE and ANT+ signals, nestled between two arms of the spider. We like this design because 1 you can easily change rings without having to recalibrate the meter, 2 the sensors are small enough that they have the clearance to not interfere with bottom bracket/chainstay direct mount brakes. The sensors are tied together requiring only one intergraded, Li-ion rechargeable battery to provide roughly 300 hours of use before needing to be recharged. Shimano went to great lengths to develop its own strain gauges for measuring data. Sensors on both arms tie into another gauge safely hidden inside the spindle that quickly detects any resistance and with some math, converts the applied force and velocity into a measurable metric, wattage. Shimano uses software that automatically compensates for temperature and elevation changes, so the reading has the same +/- 2-percent accuracy in your driveway at the start of a chilly ride in the fall as it does on the top of Pike's Peak in the summer. We get people who get outside plain and simple.
Backcountry began in 1996 with two childhood friends and a stack of avalanche beacons in an apartment in Park City, Utah. Our roots were humble, but our vision was clear: to provide the best outdoor gear to connect people with their passions. At the dawn of e-commerce, we set the precedent that gear should be accessible from anywhere by anyone. Over two decades later, we still call the trails of the Wasatch Mountains in Park City home. And from the West to the East, from mountains to oceans, wherever you are in nature, so are we.We will not accept the return of gear, bikes, or bike frames damaged due to negligence or abuse. You'll be given the option to select a reason for your return and space to fill in more details. Please provide as much detail about your return as possible. Exchanges only require a few minutes. Immediately placing a new order ensures that you'll get the new product quickly and that it won't go out of stock while you wait. These options are available for eligible U. This receipt also serves as paperwork necessary for your return. Bikes, rocket boxes, & car racks - No PO Boxes. It's our goal to answer all of your questions and to help you find the best products to meet your needs. The item "Shimano Dura-Ace FC-R9100-P Power Meter Crankset" is in sale since Wednesday, March 31, 2021. This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "backcountry" and is located in Salt Lake City, Utah.
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