SRAM DUBPMB2 QUARQ Power Meter User Manual

SRAM DUBPMB2 QUARQ Power Meter

Tools and Supplies

Highly specialized tools and supplies are required for the installation of your SRAM or Quarq components. We recommend that you have a qualified bicycle mechanic install your SRAM or Quarq components.

SRAM AXS App

After your SRAM AXS components have been paired and installed on your bicycle, download the SRAM AXS app, available for free in the app stores. Use the app to create your account, add your components, and customize your SRAM AXS experience.
Through the app, you will be able to:

• Change settings for your components
• Receive notifications for new product features and firmware updates
• Access product data and recommended service intervals

Product Registration

For software updates and information related to your products, please register online at www.sram.com/registration.

DUB-PWR

Power Meter Anatomy

• a. LED Indicator
• b. SLED
• c. Battery: AAA Lithium/Iron Disulfide (Li/FeS2)
• d. Sled outer ring
• e. AXS button
• f. Power meter
• g. Spindle cap

Crankset Installation

For crankset and bottom bracket installation procedures, visit www.sram.com/service to find the user manual for your components.
After the crankset has been installed, install the SPINDLE CAP into the drive side extractor bolt, then continue to Power Meter Set up.

Crankarm Power Meters

Power Meter Anatomy

• a. Battery cover (SRAM AXS only)
• b. Battery cap
• c. LED status indicator
• d. Power meter spider
• e. Crank arm

NOTICE
Do not attempt to access the small hole on the face of the power meter opposite the battery compartment. It does not provide any user accessible functionality, and damage to the port will compromise the water resistance of the power meter.
Damage to the power meter as a result of tampering will not be covered under warranty.

Spider Removal/Installation

NOTICE
Ensure the T20 TORX® driver is seated squarely in the bolt head when loosening or tightening bolts to avoid stripping the bolt heads.

Spray isopropyl alcohol on the spider mounting surface, and clean the interface bolt holes with a rag and cotton swab.

Install the spider onto the drive side crank arm with the new mounting hardware. Tighten the mounting bolts 1 turn in an alternating sequence until a torque of 4 Nm (35 in-lb) is achieved for each bolt.

Crankset Installation

For crankset and bottom bracket installation procedures, visit www.sram.com/service to find the user manual for your components.
After the crankset has been installed, continue to Power Meter Set up.

NOTICE
Ensure the power meter spider does not contact the bottom bracket or frame when installed. Consult www.quarq.com for an updated list of compatible bicycle frames.

Power Meter Set Up

Rotate the crank arm half a rotation and stop to turn the SRAM AXS or Quarq power meter ON.

LED Status Indicator

• Long blink = Power on, battery good
• Long blink = Power on, battery low
• 5 rapid blinks = Power on, battery critical

Pairing

Consult your Bluetooth Low Energy device or ANT+ device manufacturer for pairing instructions.

NOTICE
Ensure you are at least 30 feet (10 meters) from other transmitting devices to avoid pairing with another device.

Zeroing Procedure

The power meter can be zeroed three ways: Magic Zero, Auto Zero and Manual Zero.
Note: DUB-PWR can only use Manual Zero.
Magic Zero will periodically calibrate and zero the power meter during a ride. For more control over when zeroing happens, use Auto Zero or Manual Zero. Find more information about each of the zeroing procedures on the following pages.

NOTICE
For best results, turn on Magic Zero, or perform the Manual Zero procedure before each ride. The Auto Zero procedure can be performed instead of Manual Zero if your cycling computer cannot send a “Calibrate” command.

Magic Zero

Magic Zero will automatically check the calibration of your power meter periodically while riding.
Once Magic Zero is activated by turning it on in the AXS app, no input is needed from the user to calibrate the power meter.
All power meters released in 2016 and later are compatible with Magic Zero, except DUP-PWR.

NOTICE
Auto Zero is disabled when Magic Zero is enabled. Manual Zero is always enabled.

Auto Zero

Rotate the crank arms backward five rotations to perform an Auto Zero. The LED status indicator will blink one time when zeroing is complete.
The Auto Zero procedure may be performed while coasting with the rider on the bike, stopped using one or both feet, or by hand with the rider off of the bike.
The cycling computer will not display the Zero Offset value.

NOTICE
Auto Zero is disabled when Magic Zero is enabled. To enable Auto Zeroing, turn off Magic Zero in the AXS app.

Manual Zero

Perform the Manual Zero with the rider off the bike and the drive side crank arm at 6 o’clock, then use your device’s “Calibrate” command to zero the power meter. The power meter will return the Zero Offset value to the cycling computer.

NOTICE
The Zero Offset takes 2-3 rides to stabilize on new power meters or newly installed chainrings. If pre- and post-ride Zero Offset values frequently vary by more than 50 points, or if day-to-day values vary widely, call Quarq customer support.

Battery Overview

The power meter automatically turns on when the crank arms are rotated, and shuts off after 10 minutes of inactivity. The LED status indicator will blink green or red to indicate battery life.
Replace the battery when no LED status indicator turns on after back-pedaling five times.

Battery Safety

WARNING
Consult the coin cell and AAA battery manufacturers for safe handling instructions.
Keep the batteries out of reach of children.
Do not put the battery in your mouth. If injected, seek medical attention immediately.
Do not use sharp or metal objects to remove the batteries.

DUB-PWR Battery

NOTICE
To avoid permanent damage to the power meter caused by battery corrosion, ONLY use AAA Lithium/Iron Disulfide (Li/FeS2) non-rechargeable batteries.
Do NOT use rechargeable Lithium (Li-ion), alkaline, or nickel metal hydride (Ni-MH) rechargeable batteries in the power meter.

Crankarm Power Meter Battery Replacement

SRAM AXS Power Meters: Remove the battery cover.

Install a new CR2032 coin cell battery into the battery compartment, and tighten the cap hand tight.

DUB-PWR Battery Replacement

1. Use fingers, or a spanner wrench if necessary, to turn the outer ring of the SLED clockwise 90 degrees, in the opposite direction of the arrow, until the dot on the outer ring is aligned with the raised dot on the SLED.
2. Pull the battery SLED out of the non-drive side crank spindle by hand.
3. Remove the AAA Lithium battery and install a new battery in the correct orientation.

NOTICE
Do not allow water to enter the spindle while the SLED is loose or removed.

1. Use fingers, or a spanner wrench if necessary, to turn the outer ring of the SLED clockwise 90 degrees, in the opposite direction of the arrow, until the dot on the outer ring is aligned with the raised dot on the SLED.
2. Pull the battery SLED out of the non-drive side crank spindle by hand.
3. Remove the AAA Lithium battery and install a new battery in the correct orientation.

NOTICE
Do not allow water to enter the spindle while the SLED is loose or removed.

1. Use fingers, or a spanner wrench if necessary, to turn the outer ring of the SLED clockwise 90 degrees, in the opposite direction of the arrow, until the dot on the outer ring is aligned with the raised dot on the SLED.

2. Pull the battery SLED out of the non-drive side crank spindle by hand.

3. Remove the AAA Lithium battery and install a new battery in the correct orientation.
   

4. Align the groove on the SLED with the slot in the receiver.

5. Slide the SLED into the RECEIVER. The LED will blink to show the connection status:
   Green long flash – good connection to spindle.
   Red long flash – poor connection to spindle.
   2 Red fast flashes every 2 seconds -power measurement failure.
   

6. Align the dot on the outer ring of the battery cap with the recessed dot on the inner ring of the SLED. While pressing the end of the SLED into the spindle with your thumb, use your fingers, or a spanner wrench if necessary, to turn the battery cap counter-clockwise 90 degrees, in the direction of the arrow, until the dot on the outer ring is aligned with the raised dot on the inner ring.

Chainring Installation

Use the new chainring hardware to install the chainrings onto the spider.

Integrated Power Meter / Chainring Installation

Replacing Direct Mount Power Meter Chainrings will require replacement of the entire power meter/chainring/spider assembly.

Road SRAM AXS 4-Bolt Chainring Installation

Install the chainrings so the derailment pin on the large chainring and the point on the small chainring is in line with the crankarm. Thread the bolts into the chainrings and tighten.

1x

Install the chainring so the machined indent on the chainring is in line with the crankarm. Thread the bolts into the chainring nut covers and tighten.
The spider and the chainring nut covers have feature lines that will align when the chainring nut covers are installed correctly.

Knurled Edge Chainring Nut Installation

Hidden bolt cranksets only: Align the knurled edge chainring nut and bolt, chainring, and washer in a bench vise so the chainring is vertical. Tighten the bench vise until the top of the knurled edge chainring nut is seated in the chainring.

Remove the chainring from the bench vise. Remove the washer and chainring bolt from the chainring.

1x Hidden Bolt Crank

2x Hidden Bolt Crank

Align the chainring tabs and derailment pin so they are in line with the crank arm.

1x Non-Hidden Bolt Crank

Do not install washers on MTB X-SYNC chainrings.

2x Non-Hidden Bolt Crank

Align the chainring tabs and derailment pin so they are in line with the crank arm.

Chainring Replacement

SRAM AXS and Quarq power meters do not require slope recalibration when replacing chainrings or switching chainring size.

Maintenance

To update the firmware on your component, download the SRAM AXS app, available for free in the app stores.
Periodically clean your SRAM AXS or Quarq power meter. Use a damp cloth to wipe off dirt and debris. Clean the components with soap and water only. Rinse thoroughly with water and allow the parts to dry.
Routinely check the chainring bolts for the correct torque values; never ride with loose bolts.

NOTICE
Do not clean the power meter with a power washer. For DUB-PWR power meters, make sure the SLED is installed and tightened before cleaning.
Do not use acidic or grease dissolving agents on the power meter. Chemical cleaners and solvents can damage the power meter.
Failure to check your chainring bolts could lead to the chainring bolts backing out of the chainring.

Troubleshooting

Rotate the crank arms backward five rotations to perform an Auto Zero. The LED status indicator will blink when zeroing is complete.
If the LED light is solid red, then an error has occured.
Consult https://sram.zendesk.com/hc/en-us for troubleshooting guides or contact Quarq customer support.

Recycling

For recycling and environmental compliance, please visit https://www.sram.com/en/company/about/environmental-policy-and-recycling.

WARNING
Never dispose of batteries in a fire.

Specifications and colors subject to change without prior notice. © 2020 SRAM, LLC
The Bluetooth word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Quarq is under license. Other trademarks and trade names are those of their respective owners.

ASIAN HEADQUARTERS
SRAM Taiwan
No. 1598-8 Chung Shan Road Shen Kang Hsiang, Taichung City Taiwan R.O.C.

WORLD HEADQUARTERS SRAM LLC
1000 W. Fulton Market, 4th Floor Chicago, Illinois 60607
U.S.A.

EUROPEAN HEADQUARTERS SRAM Europe
Paasbosweg 14-16
3862ZS Nijkerk
The Netherlands

References

• Quarq SRAM Website Link Rockshox Website Link Truvativ Website Link Zipp Website Link Quarq Website Link TIME Sport Website Link Hammerhead External Website Link World Bicycle Relief External Website Link
• Quarq SRAM Website Link Rockshox Website Link Truvativ Website Link Zipp Website Link Quarq Website Link TIME Sport Website Link Hammerhead External Website Link World Bicycle Relief External Website Link
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