Adaptable, lightweight and strong, and with the latest Quarq technology, SRAM Quarq ELSA 10R Power Meter 50/34 Tooth BB30 Chainset packs a four-pronged punch to elevate bike and rider performance. The subatomic spider houses integrated electronics, a CR2032 battery, LED indicator and visible ANT+ ID. Power Balance captures left and right drive strokes. OmniCal gives you a choice of chainrings with no compromise on accuracy. Exogram Hollow Carbon crank arms by SRAM reduce weight and increase performance. With lengths of 170 to 175mm, ELSA will take any athlete’s cycling to the next level.