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SRAM S975 Quark Power Meter Crankset 
With the new SRAM crank coming to market you can get a great deal on the previous version but lose none of the power tracking features Quarq has become known for.
The lightweight leader for wireless power devices
Feature SRAM's integrated carbon crank arm and SRAM Red chainrings
Ultra-low power electronics package including high-accuracy strain gauge measurement
ANT+ technology allows it to sync with a Garmin or with nearly any display unit
Accurate to +/-2%
Tool-less, user-replaceable battery
Black chainrings included.
Bottom bracket not included
Weight884 grams with BB (GXP 53/39, w/BB)
Weight: 766 grams (GXP 172.5mm 50/34
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