The Quarq SRAM XX1 Eagle DUB Power Meter Crankset and the new SRAM XX SL Eagle AXS Transmission Power Meter Spider Crankset are SRAM’s and Quarq’s two MTB power meter crankset offerings. They both measure dual-leg power, feature 8-bolt carbon fiber crank arms and are compatible with SRAM DUB Bottom Brackets. However, we find that customers are often trying to figure out which option would be best for them. Below, you can see the similarities as well as the differences…with the main one being chainring configuration.
Power Measurement: Both power meters are spider-based. That means, they measure power at the crank spider and are therefore able to measure power from both legs.
Left/Right Power Balance: Both power meters can provide left vs. right leg power balance data.
Frame Spacing: Most modern mountain bikes have either 52 mm Boost or 55 mm Super Boost chainlines. The Quarq XX1 Eagle DUB fits both frames, as well as older 49 mm Standard chainlines. This is made possible by different XX1 power meter spiders (Standard and Boost) as well as different SRAM XX1 Eagle DUB Crank Arms (Boost and Super Boost).
In addition, the new SRAM XX SL Eagle AXS T-Type can also fit Boost and Super Boost frames. This is made possible by the different offsets (0 mm and 3 mm) that the SRAM Thread Mount Chainring is available in.
Batteries: Both power meters use CR2032 coin-cell batteries and get around 200 hours of battery life.
Communication Protocol: Both are ANT+ and Bluetooth compatible, which is standard for pretty much every power meter.
Calibration: Both have auto-zero functionally, which eliminates the need for manual zero-offsets.
Bottom Bracket: Both power meter cranksets fit SRAM DUB Bottom Brackets.
Warranty: Both units come with a 2-year warranty.
Chainring Size: Technically, both power meter cranksets are available in 32T – 38T chainring sizes. However, the Quarq SRAM XX1 Eagle DUB Power Meter Crankset is able to be used with a 3rd party (we usually use Wolf Tooth) 30T chainring. The WT ring is compatible with 9-, 10-, and 11-speed chains. It is also compatible with 12-speed SRAM and 12-speed KMC chains (not compatible with Shimano 12-speed chains).
Drivetrain: The Quarq SRAM XX1 Eagle DUB Power Meter Crankset, which uses the SRAM X-SYNC 2 Chainring, is only compatible with non-T-Type SRAM Eagle 12-speed drivetrains. However, the new SRAM XX SL Eagle AXS Transmission Power Meter Spider Crankset, which uses the SRAM Transmission Thread Mount Chainring, is compatible with both T-Type and non-T-Type SRAM Eagle 12-speed drivetrains.
Price: The Quarq SRAM XX1 Eagle DUB Power Meter Crankset is priced at $1,129 whereas the SRAM XX SL Eagle AXS Transmission Power Meter Spider Crankset is priced at $1,050. There is also a non-SL version that is priced at $950.