MEASUREMENT OF POWER
With Shimano’s first integrated power meter you can expect extremely accurate real time power data to track and analyze your performance. The power meter allows integration and easy installation (pairing) with third party display units to enable the most sophisticated and accurate level of performance measurement and anatomic analysis available today. Not only can the pure output of watts be measured, left and right legs can be measured separately, as well as cadence, giving you the truest measure of performance, isolated from external factors such as gradient, road surface and wind.
The FC-R9100-P is Shimano’s first pedaling power measurement product and also the first crank-integrated power meter on the market. It is built to provide riders with one of the most accurate systems of power measurement, utilizing technology from bikefitting.com, a Shimano-owned company specializing in highly advanced bike fitting and bike measuring instruments.
The power meter ‘brain’ sits inside the Dura Ace drive crank body (the spider) and the strain gauges sit inside the crank arms to measure left and right leg power. The brain is discrete and compact, providing a system that’s one of the lightest and cleanest on the market. Because the power meter is connected to the spider, chain rings can be easily changed without affecting the power meter’s accuracy. The system checking and firmware upload can also be operated by your smart phone or tablet PC through a Bluetooth connection (E-TUBE).
An integrated rechargeable battery powers the unit. This can be charged with a small magnetic adapter without needing to remove covers or casings.
Fred Grappe, Head of Performance at Francaise Des Jeux professional cycling team was part of the DURA-ACE power meter development team.
“Modern day cyclists cannot train more, they can only train smarter. A power meter allows this, giving riders feedback on what their legs are doing. It takes the guess work out of riding, providing valuable and relevant feedback on performance and telling riders what they need to do in training and/or recovery. If you're riding by feel, or training by hours, or trying to maintain an average speed, then you're ignoring so many other variables that could turn you into a better rider or tell you when to make your efforts count. Now, your real benchmark of performance will be the sensations you associate with the output of power from your left and right legs.
“In the past Shimano developed the most advanced power crank I’ve worked with for use in a laboratory. We took that technology and experience from the laboratory and transferred it into a system suitable for use in real world racing situations. Together with the Francaise Des Jeux team we’ve been testing it throughout the 2015-2016 season and we’re incredibly impressed with the breadth of powerful analytical information.”
A NEW LEVEL OF WHEEL PERFORMANCE
Two forces combine to slow down riders: air drag and inertia. DURA-ACE R9100 wheels are designed to combat these forces through aerodynamic features and reduced rolling resistance.
Two new 28mm wide C60 and C40 rim platforms bring a stiffer wheel to enhance forward and side-to-side (lateral) power transfer and, with ultra-light carbon rim heights of 60mm and 40mm, are also designed to reduce air resistance. This allows Dura Ace R9100 C60 wheels, in a real world scenario, to save 16W over Shimano’s current DURA-ACE 9000 C50 wheelset.
C24 wheels complete the DURA-ACE lineup giving riders three rim heights to choose from (60mm, 40mm and 24mm). Selected wheels are available as clincher, tubular or tubeless versions with Shimano quick release hubs and the option of road E-thru axles (12mm).