This article originally appeared on BikeRadar
Stages Cycling has revealed carbon crankarm versions of its single-sided power meter at Eurobike, along with a new smaller housing, which will be phased in across the whole range.
Stages introduces carbon crankarm power meters
With its cracking of the carbon conundrum, Stages has added compatibility for Campagnolo Super Record, Record and Chorus as well as FSA SL-K Light and SRAM – the latter via Stages' first own-brand crankarm.
Up until now, Stages' power meter technology has been exclusively available to riders running alloy crankarms. Stages says the company has been working on a carbon version for years, but has had to overcome several hurdles before bringing the finished meter to market. Issues stymieing the quick production of a carbon Stages meter included difficulty in bonding to a composite material, temperature compensation and different fatigue characteristics.
Sam Morrison, Stages Cycling engineer and carbon product manager, said: "We could have made a carbon power meter a long time ago, but it would have had the functionality of a meter from the pre-Stages era.
"The problem isn't measuring deflection in carbon, it's dealing with changes of the material when the operating temperature changes. We could have easily released a meter that would require constant and vigilant zero resets; rather, we took our time and built a new system to specifically deal with the challenges carbon faces when temperatures change.
"What we're delivering is a fully functional Stages power meter for carbon cranks, and we're proud of that. We made no concessions."
The carbon Stages units use an entirely new strain gauge developed to measure deflection of carbon cranks to the same level of accuracy as the Tour de France-winning alloy models, while also maintaining automatic temperature compensation.
Stages Cycling carbon crankarm
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