Quarq makes power meters for road, MTB and CX applications. They have been making power meters for over a decade and they bring considerable expertise into the manufacturing process. All Quarq power meters measure power at the spider. This is an ideal place to measure power as spider-based designs are able to measure the power generated from both legs. In addition, they often allow you to keep your current cranks. They offer their power meters as stand-alone spiders (for customers that already have compatible crank arms), or you can purchase the entire crankset (power meter plus cranks). All models are accurate to within 1.5% and feature ANT+ and Bluetooth SMART technology.
Additional Quarq Power Meter Info:
If you purchase a stand-alone Quarq power meter spider, installation requires that you remove your current crankset, replace your spider with the Quarq and reinstall your crankset. Please note that for certain cranksets, a lock ring tool (sold separately) is required to remove the spider. If you purchase a complete crankset, you simply remove your current crankset and install the new one. Please note most units also require the use of a SRAM DUB Bottom Bracket.
Quarq spiders weigh around 125-165 grams depending on the version and the BCD size. When purchasing a power meter, we recommend you focus on added weight. Therefore, simply subtract the weight of your current crank spider in order to determine the added weight of the power meter. You’ll likely find the weight added by the power meter spider is minimal as you are basically just adding some electronics and a battery.
Quarq measures power at the spider. This is an ideal place to measure power for several reasons. To begin with, these units are able to measure power from both legs, as opposed to left leg only like some other power meters. They can also provide left/right power balance data. Spider-based units are accurate, reliable and durable. Lastly, with models starting at $399, they are highly affordable.
Based on the model, features include SRAMs DUB (Unified Bottom Bracket) technology, SRAM AXS and MagicZero. These are all features made to ensure your power meter is highly compatible and simple to use.
The Quarq SRAM Red AXS power meter uses a rechargeable battery, whereas the Quarq DZero and DFour use a CR2032 battery with 200-hour battery life.
These power meters transmit data via both the ANT+ and Bluetooth SMART wireless protocols. Therefore, they are compatible with any bicycle computer, smart phone or tablet.
Quarq power meters are accurate to within +/- 1.5%. This is on par with the majority of other power meters on the market.
Like most power meters, these power meters use an accelerometer to measure cadence. An accelerometer is an electronic device that is housed inside the power sensor and measures your pedaling rate.
Quarq power meters come with a two-year warranty which covers the product from defects in material and workmanship.