SRAM’s power cranksets are based around Quarq’s relatively new CinQo Saturn and the SRM’s long-standing and well proven unit. Compatible with all of SRAM’s road groupsets the cranksets do however differ from the design formula for the company’s standard crank options.

The spider-mounting of both the Quarq and SRM systems meant SRAM couldn’t simply transfer the carbon arms from their Red and Rival groupsets. Instead, the carbon arms featured on the power units were specifically designed to accommodate the necessary hardware. Each version includes its own unique spider and both use a 130mm BCD for standard-sized chainrings. Available crank lengths range from 170mm to 177.5mm.

In terms of frame compatibility, the cranksets can either be coupled with SRAM’s GXP bottom bracket or the growing list of BB30 options.

The SRM’s data is transmitted wirelessly via an inconspicuous sensor mounded beneath the bottom bracket. Both the SRM and Quarq versions of SRAM’s crankset are compatible with the BB30 design.