Quarq Power Meter Spindle and Left Arm Apex Wide DUB black 170mm/Noringst

The Apex AXS Wide DUB upgrade kit from SRAM includes the left crank arm with power meter axle and comes in a matching Apex look. It is used for left-side power measurement, using proven QUARQ technology. The measuring unit is concealed in the crank axle and reliably protected from water. In combination with a DUB bottom bracket, you get a durable unit with impressive performance. Overall, the upgrade means a negligible additional weight of just under 40 g. The runtime of the AAA lithium battery, which you can easily replace yourself, is over 400 hours and thus covers a season.

Accurate and reliable power measurement is practically a must these days. The Apex AXS power meter upgrade integrated into the shaft is the easiest way to obtain precise power data. As the technology is hidden in the DUB shaft, it fits almost any bike and remains inconspicuous.

• left crank arm with Powermeter axle to replace the original crank arm
• DUB-PWR axle unit measures left-side power to determine total wattage
• Proven reliability and accuracy with QUARQ technology
• Wide: 5 mm longer axle, chainline shifted outwards especially for bikes with wide gravel tires
• simple, durable DUB bottom bracket system
• Energy display (total power), calibration, battery status display via app
• long battery life covers an entire season
• Easily replaceable battery
• IPX7 waterproof up to 1 meter for 30 minutes
• lightweight: adds less than 40 g to standard crankset

DUB™
The crankshaft and bottom bracket unit is the heart of DUB technology. This is where stiffness meets durability. SRAM has gone one step further and made everything even simpler and better. It is largely the system approach through the integration of chainring, crank, shaft and bottom bracket that means better drivetrain performance.

AXS
AXS is SRAM's electronic integration platform that connects electronic bike components and software. The SRAM AXS app allows you to see battery status, change component behavior, adjust controls, receive maintenance reminders and update firmware.