SRAM Apex Power-Upgrade AXS WIDE Left Crank Arm

The SRAM Apex Power-Upgrade AXS WIDE power meter is a left crank arm upgrade that measures power without changing the crankset. The sensor is hidden in the DUB spindle, so it fits almost any bike and keeps the installation discreet. It measures left-leg power and uses this to calculate total power in watts, useful data for training with reliable figures.

The system uses proven Quarq reliability and a AAA lithium battery that lasts over 400 hours, approximately a season of riding, and that you can replace yourself. The unit is IPX7 rated, withstands 1 m for 30 minutes, and adds less than 40 g compared with a standard crankset. It is black, with a DUB bottom bracket: check this specification before ordering.

Founded in Chicago in 1987 by Stan Day and a group of cycling enthusiasts, SRAM is still based in the US city today. It makes drivetrains and brakes for road, gravel and mountain bikes. Its story began with a single product: Grip Shift, the shifter that lets riders change gear by twisting the grip.