When it comes to a mountain bike power meter pedal, you have two choices: the Garmin Rally XC and the SRM X-Power. Both pedals are quite popular. They are compatible with any bike, are quick and easy to install and can measure power from both legs (dual-sided versions). However, they are not without their differences. Therefore, we wanted to compare and contrast these two MTB power meter pedals in order to help our customers decide which would be best for them.
Compatibility: Both the Garmin Rally XC and SRM X-Power MTB power meters are compatible with any bike.
Cleats: Both of these power meters use SPD mountain bike cleats (included with the pedal and also sold separately).
Versions: Both power meter pedals are available in either a dual-sided version or single-sided version. With both versions, you get a left and right pedal, however the dual-sided pedals have a power sensor in each pedal and can measure power from each leg. The single-sided versions only measure power from one leg, making them slightly less accurate in certain situations.
Warranty: Both the Garmin Rally XC and the SRM X-Power come with a full 2-year manufacturer’s warranty.
Communication Protocol: Both are ANT+ and Bluetooth compatible, which is standard for pretty much every power meter.
Price: The Garmin Rally XCs are a bit more affordable at $1,199 and $699 for the dual- and single-sided versions, respectfully. This compares to $1,499 and $1,199 for the dual- and single-sided versions of the SRM pedals.
Size: The SRM X-Power resembles the size of a standard MTB SPD pedal, whereas the Garmin Rally XC is a bit on the chunky side. Garmin notes that it was purpose built to be larger in order to be able to better withstand the abuse of off-road riding.
Batteries / Charging: The Garmin uses LR44/SR44 (x4) or CR1/3N (x2) batteries, whereas the SRM’s are rechargeable. While some customers favor a rechargeable power meter, we note that the charging ports on the SRM are sometimes a bit finicky.
Colors: While the Garmin Rally XC comes in just one color (as pictured), the SRM X-Power comes in several colors including Black, Red, Blue and Green.