DZero Carbon Power Meter Crankset Package - BB30 by Quarq
Though the crankarms themselves are branded "Quarq," they're actually the Exogram carbon models used by sister-company SRAM in its carbon fiber offerings. The key difference between the DZero and, say, the Force or Red cranks is the bolt pattern and the spider, which houses the strain gauges constituting the "Power Meter" part of the BB30-compatible DZero Carbon Power Meter Crankset Package. Quarq's power meter design enjoyed a healthy amount of retooling for the DZero model. Overall, Quarq claims that "150 documented improvements" inform the evolution from the previous models to DZero, but the most important is to the heart of the meter itself: the strain gauges and measurement circuitry. Of course, no amount of power measuring can make up for the lack of input, so we've equipped the chassis with a pair of SRAM road rings in either a standard, semi-compact, or true compact figuration, covering a range of use from Kona to l'Alpe d'Huez. Given the success that Quarq's previous models have enjoyed at these locations in the past, we're confident that we'll see the newest power meters proving themselves at both in the coming years. The new model still incorporates five strain gauges strategically placed throughout the spider in order to measure the Newton meters you're throwing into the pedals. It's also still got the same claimed accuracy of +/- 1. 5%, so its numbers are 0. 5% more accurate than most meters, but the new design requires less correction in order to maintain accuracy in drastic temperature changes. Fewer corrections mean the DZero also better rations battery life than Quarq's previous power meter models, though when the battery does go out, you can still change it without tools or having to ship the whole thing to the manufacturer. The DZero system's accuracy is further boosted by the return of Quarq's 10k dynamic temperature compensation technology, which alleviates the need for constant, mid-race zeroings in variable conditions. Even if it's just ...
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