Rival AXS Left Crank Arm With Power Meter Spindle, 172.5mm, 12/13-Speed, DUB PM Spindle, Aluminum, Black Finish, Left-Side Power Meter For Real Watts Readouts And All-Day Battery Life
✔️ Left-side power meter reads watts; 172.5mm crank, DUB PM spindle
The Rival AXS left crank arm with power meter spindle is a spindle-based power meter accessory designed for SRAM AXS road cranksets. It measures left-side power to estimate total watts, delivering real-time watts with long battery life and a user-replaceable lithium AAA battery. This aluminum left arm finishes in carbon and is typically used with a separate right crank arm, bottom bracket, spider, and chainring sold separately.
✅ Aluminum left crank arm with power meter spindle; right crank arm, BB, spider, and chainring sold separately
✅ Spindle-based meter measures left-side power to estimate total watts
✅ Long battery life with user-replaceable lithium AAA battery
✅ IPX7 waterproof to 1 m for 30 minutes
✅ Lightweight (less than 40g heavier than standard crankset)
✅ Color: Carbon finish
172.5 mm length included
💡 What is a left crank arm power meter used for in cycling?
The handy answer: it gives cyclists real watt data by measuring the left leg to estimate total power, helping pace and training decisions.
- left-side power data helps set training zones
- works with spindle-based power meters on AXS cranksets
- long battery life keeps you riding without frequent battery swaps
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