Shimano has lifted the lid on the latest versions of its flagship Dura-Ace mechanical and electronic road groupsets. Officially known as Dura-Ace R9100 (mechanical) or R9150 Di2 (electronic), the groups push several firsts for Shimano on the road side of things, including the options of an integrated power meter, hydraulic disc braking and the migration of Shimano’s clever synchronised shifting technology.
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Let’s clear a couple of things up before we move on. Dura-Ace will continue to be available in electronic (Di2) and mechanical options, and both will remain 11-speed. Along similar lines, Dura-Ace Di2 will not be wireless in a traditional sense, although it does feature some wireless functionality, which we’ll explain in more detail below. Also, Shimano has released US pricing, but not yet UK pricing.
Numerous configurations mean that regardless of whether a rider wants disc or rim brakes, mechanical or electronic shifting, or the option to run a TT handlebar, the compatibility is now there — and all at the Dura-Ace level instead of the previous non-series options for hydraulic brakes.
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Shimano Dura-Ace R91000 US prices and complete group weights
- Shimano Dura-Ace R9100 mechanical group - 2,007g w/out cables, 2,097g with - $2,029
- Shimano Dura-Ace R9120 mechanical/hydraulic group - 2,355g w/out cables, 2,445g with - $2,354
- Shimano Dura-Ace Di2 R91050 electronic group - 2,051g - $3,046
- Shimano Dura-Ace Di2 R91070 electronic/hydraulic group - 2,389g - $3,137
Power meter inside
Dura-Ace’s latest Hollowtech II crankset is available with (FC-R9100-P) or without (FC-R9100) a power meter and in a wide variety of gear options and with seven crank arm lengths ranging from 165 to 180mm. The new crank weighs a claimed 621g and is priced at $543. Shimano hasn't yet disclosed a price or weight on the power meter.
To the untrained eye, the power meter version is difficult to distinguish from the regular crankset. Look closely at a power meter-equipped example and you’ll notice a slight lump sitting inside the four-arm spider on the driveside crank. This is the ‘brain’ of the system, while strain gauges are placed in both crank arms.
Shimano says riders using its first integrated power meter can expect extremely accurate real-time power data to track and analyse their performance.The meter itself is claimed to pair easily with third-party display units to enable the "most sophisticated and accurate level of performance measurement and anatomic analysis available today".
Disc brake debut
For those who don’t want discs
Electronic shifting is now synchronised
New wireless functionality
For those who prefer cables to wires
All-new wheels
Pedals
You can read more at BikeRadar.com
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