Modified at: Jun 16, 2022
Posted at: May 2, 2022
A comprehensive and thorough comparison of GARMIN power meters! Differences between models, performance, and more.
Table of contents
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All GARMIN power meters are “pedal-type” and their shapes are similar to Shimano’s SPD-SL and SPD and LOOK’s Keo pedals, so they can be set up and used just like their respective binding pedals.
One advantage of the pedal type is that they can be easily replaced on the bike. Pedals can be easily replaced with a pedal wrench or an Allen key, so even if you are switching from a training bike to a battle bike, you can create the same environment by simply changing pedals before you ride.
Another advantage of the pedal type is that you can freely choose the cranks. With a crank-type power meter, the crank is usually specified as a Shimano crank, but with a pedal-type power meter, you can install the crank of your choice on your bike, allowing you to continue using the power meter even if you upgrade the crank.
One of the features of GARMIN power meters is that they offer a wide variety of options.
In the case of the Rally series, all parts except the shaft are offered as options, so you can continue to use the meter by obtaining replacement parts even if they become worn through use.
The Rally series is the latest in GARMIN’s lineup of power meters, with models compatible with SPD, SPD-SL, and Look KEO cleats.
As for the model number, the first letter of the alphabet indicates the compatible cleat, and the number at the back determines whether it is a single sensor (100) or dual sensor (200).
The single-sensor model measures power with only one pedal, while the dual-sensor model measures power with both pedals for greater accuracy and the ability to measure the power balance of both feet. The single-sensor model can be converted to a dual-sensor model by replacing the single-sensor pedal with an optionally available single-sensor pedal.
The power measurement system has a high accuracy of ±1.0% for both single and dual sensor models in the specifications. The battery is an LR44-type button cell battery with a maximum operating time of approximately 120 hours, and communication via ANT+ and Bluetooth is supported.
As an option, only the pedal body part without the shaft is sold, so the pedal body can be converted to SPD-SL, SPD, or LOOK Keo by replacing the pedal body. Even if you replace the pedals on other bikes with pedals that have different cleats, you can operate them without replacing the cleats on your shoes by replacing the body.
The main model compatible with Look’s Keo cleats is the Vector 3 series. There are two lineups: the dual-sensor Vector 3, which can measure power on both feet, and the single-sensor Vector 3S, which only measures power on one foot. For the Vector 3S, an upgrade kit allows for dual-sensor conversion.
Both models have a power measurement system of ±1.0% and support ANT+ and Bluetooth communication. The battery is an LR44 button cell with a maximum operating time of approximately 120 hours.
Note that the “Conversion Kit,” a replacement body part for the Rally series, is also compatible with Vector 3, so Vector 3 can also be converted to SPD-SL and SPD using optional parts.
The Rally and Vector 3 series have the same power accuracy and battery activation time, and the only major difference between the two is the compatible cleats. the Rally series allows you to choose your favorite model from the SPD-SL, SPD, and LOOK Keo.
If you are operating multiple bikes, you can choose pedals with the same cleat type and operate them without changing the cleats on your shoes.
Since Vector 3 is only available in the LOOK Keo model lineup, using it with SPD-SL or SPD requires the additional cost of a conversion kit, which must be purchased separately.
Also, in Japan, where Shimano products are very readily available, it is more convenient to use pedals with SPD-SL or SPD cleats.
GARMIN power meters can be used in different situations by changing the pedal body to accommodate different cleats. This is true for both the latest Rally series and the older Vector 3 model.
For example, the biggest advantage of the Rally series is that you can use the SPD-SL RS model for long rides and change the body to SPD only for cyclocross or gravel rides.
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