SRAM Elsa Quarq 177.5mm 50/34 Crankset

Accuracy and consistency in training always leads to better results, which is why it is vital to use a consistently accurate and reliable power meter. And the Quarq's system SRAM just might be the most reliable on the market.

SRAM's Quarq power meters measure power at the spider, which is the best place on the bike to measure power due to all of the pedaling force flowing directly through the spider. Quarq's Active Temperature Compensation (ACT), which is calibrated with over 10,000 data points, makes their power meters accurate to within 1.5%.

Specifically designed to match Shimano's 4-bolt Hollowglide chainrings. ANT+ technology lets you hook up your desired compatible head unit, the LED indicator flashes when the power meter is on, and the single, easily-replaced CR2032 battery lasts for up to 300 hours of ride time.

SRAM GXP bottom bracket sold separately.