- 100 day return period
- Online since 1998
- Trusted Shop 4.9 / 5.00
Information regarding the return of batteries:
You can find this information here.
Compatibility: Dura Ace R9100 chainrings
Chainring Mount: 110 mm bolt circle diameter, 4-arm
Crankarm Material: carbon
Spider Material: aluminium
Crankarm Length: 170.0 mm, 172.5 mm, 175.0 mm
Chain Line: 45 mm
Axle Diameter: 24 mm
Recommended Bottom Bracket: GXP (not included)
Data Transfer: Bluetooth® Low Energy, ANT+
Battery: CR 2032
- data transfer via Bluetooth and ANT+
- battery is easy to change (lasts roughly 200 hours)
- IPX7 waterproof certification
- Precision: +/- 1.5 %
QUARQ technology powers SRAM’s road power meters including the groundbreaking SRAM Red QUARQ power meter.
How power meters work:
Power meters calculate power by measuring the torque (pedal force) and the angular velocity (cadence). Power = torque x cadence.
When you press on the pedals, all parts of the bikes drivetrain displace (flex) slightly under the load. Power meters are designed using finite element analysis to displace in a very controlled manner in specific locations in response to applied load. Strain gauges are used to measure the displacement and thus calculate the applied torque. Reed switches are used to calculate cadence.
SRAM power meters use a proprietary strain gauge arrangement and precision digital circuitry to delivery high accuracy and low power consumption for optimal battery life.
Inside QUARQ power meters:
ANT+™: A wireless standard for bicycle electronics that ensures interoperability between sensors and bike computers from different manufacturers.
OmniCal™: Power measurement is independent from chainring selection. Switch from road to TT chainrings without impacting accuracy. No recalibration necessary.
Power Balance™: Displays the ratio of power generated in the right drive stroke (first half) versus the left drive stroke (second half). Let you work on an equal pedal stroke over 360 degrees of rotation.
170.0 mm: 00.3018.192.170
172.5 mm: 00.3018.192.172
175.0 mm: 00.3018.192.175
Additional Components Needed:
The bottom bracket is not included. In our shop you will find a selection on Truvativ GXP-bottom brackets.
- 1 x QUARQ Dfour91 11R-110 crankset
- chainring bolts included
- chainrings not included
- GXP bottom bracket not included
-black / 170.0 mm : 594 g