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4D504117 SK7638
140340-Q0-L
Manufacturer Part Number: RF728-GK-B
RF1594 CK3408
Using its Opto-RS232 data output device
SRAM XX Left Arm with Power Meter Spindle, 170mm, Black 26" Rims 4D504117 SK7638World stage proven XX crank arm with a subtly integrated power meter to record and deliver live, accurate power readings to your head unit Utilizes what is called DUB PWR, a unique design that elegantly houses Quarqs reliable and accurate power measurement inside the DUB crank spindle itself Measuring left side power to calculate total watts, its subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life It is also
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