STAGES POWER L CARBON
£569 Enter Stage(s) left
Stages’ left side 2012 crank-based power meter was instantly popular, due to its ease of fitting and low price in relation to spider-based units at that time. It was only available incorporated on aluminium cranks, with the debut of a carbon crank-based equivalent a development cycle away.
Stages teamed up with FSA to produce the Stages Carbon crank. Available in 165mm, 170mm, 172.5mm and 175mm lengths, our 175mm Stages Carbon GXP crank weighed in at 165g. This 3rd generation meter only adds 20g to the crank, and has a new, lower profile housing design, said to reduce frontal area by 17 per cent and broaden frame compatibility. Stages says the whole unit is stronger, but the battery door’s interface is claimed to be 200 per cent stronger. The Stages unit is compatible with ANT+ and Bluetooth Smart, plus a wide range of popular performance tracking software, so it can update its firmware wirelessly.
Because power is only measured on the left leg, that figure is doubled to give an estimated combined power that Stages claims is accurate within ± 1.5 per cent, improving on the generation 2 unit’s ± 2 per cent. After a quick fit with an 8mm hex key, and simple calibration, our testing period included daily temperatures between 14 and 37 degrees Celcius, which the Stages Carbon’s active temperature compensation easily coped with.
Tested with a SRAM Force carbon drive side crank, the Stages Carbon crank felt equally stiff under full load. There’s a delay of around 4-5 seconds between starting to pedal and data appearing on your head unit, but that’s not usually a problem on the road. Power can be recorded up to 2500 watts, and cadence between 20 and 220 rpm, but there’s no balance reading. Otherwise, apart from a couple of maximum power readings that slightly exceeded our expectations, every metric tracked accurately with our existing power meters.
Its accuracy, quick-fit, swappable design and extended crankset compatibility, with almost no weight gain, make the Stages a great choice for existing carbon crank users unwilling to splash out on a L-R power system.
AXLE 01 Compatible with FSA BB386, SRAM GXP and DUB and BB30 cranks from SRAM, Easton & Specialized, Campag Stages carbon power cranks are available for Chorus, Record and Super Record. BATTERY 02 The CR2032 battery compartment on the 1st generation Stages L crank had water resistance issues; with an IPX7 rating those days are long gone and has an estimated 200 hours use. CARBON 03 Stages’ proprietary hollow carbon crank is manufactured by FSA, and its lightly marbled finish is a good visual match for both SRAM’S and FSA’S carbon chainsets.