Quarq

Quarq’s ELSA RS packs a four-pronged punch to elevate performance for the Shimano® equipped bike and rider. Specially designed to accommodate Shimano’s 4-arm Hollowglide™ chain rings, the spider houses integrated electronics, a CR2032 battery, LED indicator and visible ANT+™ ID. Quarq’s new multipoint, active temperature compensation fine-tunes accuracy and consistency, making this our most exact power meter to date.

For Shimano® 11-speed drivetrains.
ELSA RS is a bolt-on upgrade for Shimano’s 11-speed Dura-Ace 9000, Ultegra 6800 and 105 5800 group sets.
Sold as a chassis (without chainrings).
ELSA RS requires a compatible SRAM bottom bracket.

Available in 162.5mm – 177.5mm lengths and built on Quarq’s current technology platform:
Power measurement in the crankset spider — the heart of your bicycle, its sole job is to convert the effort from both legs to forward motion.
10K™ temperature compensation eliminates temperature effects on power measurement.
AxCad™ accelerometer cadence removes the need for a magnet.
An LED and visible ANT+™ ID streamline installation and operation.
OmniCal™ means you can change chainrings without affecting accuracy.
CR2032 battery – 300 hours of riding time.
ANT+™
+/- 1.5% accuracy
Exogram™ Hollow Carbon crank arms
Power Balance™
Quarq power meters have an IPX7 waterproof rating. They feature a 2-year warranty, free firmware updates and Quarq’s acclaimed worldwide support.