Power Meters

Power meters have been avail­able to the cycling masses for many years, and never be­fore has there been as many op­tions for the con­sumer as there are to­day. Whether power is mea­sured at the hub, the cranks or the ped­als, out­put mea­sured in watts is key to

Pedal Magazine - - Far East Tour­ing -

4iiii Pre­ci­sion Pro

The Pre­ci­sion Pro dual-side power meters de­liver all the ben­e­fits of 4iiii’s left-side model, in­clud­ing ac­cu­racy, light­weight design, ANT+ and Blue­tooth com­pat­i­bil­ity, 3D power-me­ter tech­nol­ogy plus a spe­cific break­down of left and right wattage. The “Ride Ready” ver­sion comes pre-in­stalled on a new Shi­mano Dura-Ace FC-9000 se­ries crankset or you can send in your own cranks to have the 4iiii Pre­ci­sion Pro fac­tory-in­stalled.

Pioneer SGY-PM91 Se­ries

Pioneer’s lat­est SGY-PM91 Se­ries dual-leg crankarm power me­ter mounted to Shi­mano road cranksets pro­vides 12-point anal­y­sis us­ing dual strain gauges (one on each left/right crankarm). Pioneer dif­fer­en­ti­ates from other power-me­ter man­u­fac­tur­ers by mea­sur­ing in­de­pen­dent power data from both legs, and trans­mits this in­for­ma­tion 12 times within each pedal ro­ta­tion. In ad­di­tion to mea­sur­ing vis­i­ble raw power at 12 points in each stroke, other new in­sight­ful pa­ram­e­ters in­clude where power is be­ing ap­plied in each pedal ro­ta­tion, the torque lo­ca­tion and force an­gles of each pedal stroke, as well as the lo­ca­tion and level-of-power de­fi­ciency within the pedal stroke. With this data, an­a­lyze the unique char­ac­ter­is­tics of your ped­al­ing and quan­tify your per­for­mance as a “Ped­al­ing Ef­fi­ciency” value.

Quarq DZero

The Quarq DZero com­bines 10 years of tech­nol­ogy ad­vances with such new fea­tures as dual Blue­tooth low en­ergy and ANT+ wire­less data trans­fer, the new Qalvin BLE app and com­pat­i­bil­ity with BB386EVO bot­tom brack­ets. Ex­o­gram car­bon-fi­bre crankarms are stiff and light­weight, and the AxCad fea­ture means no ca­dence mag­net is re­quired. The bat­tery is a re­place­able CR2032 that pro­vides 200-hour bat­tery life and can be changed with­out tools.

Shi­mano Dura-Ace

The new Shi­mano FC-R9100-P Dura-Ace power me­ter guar­an­tees re­li­a­bil­ity as it boasts a com­pletely sealed, crank-in­te­grated design that is wa­ter­proof in all con­di­tions, with the built-in bat­tery recharged by a small mag­netic adapter, so there’s no cover to open. The di­rect in­stant-re­sponse sys­tem en­sures ac­cu­rate data col­lec­tion for sta­ble power mea­sure­ment at var­i­ous step­ping po­si­tions. It also fea­tures a sim­ple re­set via a switch on the trans­mit­ter. Com­pat­i­ble with third-party dis­plays via Blue­tooth and ANT+ tech­nol­ogy, the FC-R9100-P is made with Hol­lowtech II con­struc­tion, works with the Hol­lowglide chain and is 11-speed com­pat­i­ble.

Stages Power

The only car­bon-based, di­rect-force mea­sure­ment power so­lu­tion on the mar­ket to­day, the Stages Power car­bon me­ter does not com­pro­mise the func­tion­al­ity or the sim­plic­ity of the Stages Power me­ter. Mea­sur­ing torque, con­trol­ling for tem­per­a­ture vari­ables and con­sid­er­ing com­pat­i­bil­ity across bot­tom-bracket op­tions are just a few of the chal­lenges faced when de­sign­ing for car­bon, and the Stages so­lu­tion is a me­ter en­gi­neered to work with a wide range of cranksets, across mul­ti­ple bikes and cycling dis­ci­plines. This new gen­er­a­tion of Stages’ hous­ing design gives the me­ter a 28% lower pro­file, with a 17% re­duc­tion in frontal area, while in­creas­ing the strength of the bat­tery-door in­ter­face by 200%. It is com­pat­i­ble with SRAM GXP and BB30, FSA 386EVO and RaceFace Next SL.

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