Description
The SRAM Apex DUB Power Meter Upgrade Left Arm is a direct-swap left crank arm that adds power measurement to your existing Apex DUB crankset without replacing the whole drivetrain. Quarq strain gauge technology is integrated into the arm itself, reading left-side pedaling power and doubling it to calculate total wattage output — a clean solution for riders who want training data without a full groupset change.
Battery life is rated at 400-plus hours, which means the power meter runs quietly in the background across weeks of riding before you need to think about it. The IPX7 water resistance rating means it handles rain, puddles, and post-ride washdowns without issue. Available in five crank arm lengths — 160mm through 175mm — it fits a wide range of riders and fit setups.
SRAM Apex DUB Power Meter Specs at a Glance
- Compatibility: Apex DUB cranksets
- Measurement: Left-side power with doubled calculation for total watts
- Battery life: 400+ hours
- Water resistance: IPX7
- Crank arm lengths: 160mm, 165mm, 170mm, 172.5mm, 175mm
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