The power-sensing spindles transfer between Rally body types through Garmin's conversion kit system. A transferable spindle can be installed in Rally RK road or Rally XC off-road pedal body kits (each sold separately) , so you can move the same dual-sensing electronics across cleat platforms as your riding changes. The measurement components live in the spindles, not the pedal bodies. If you ride both road and mountain bikes, or switch between road racing and cyclocross seasonally, you can move the same dual-sensing spindles across different cleat systems without buying multiple power meters. The RS200 spindles also work in older Vector 3 pedal bodies if you're upgrading from that system.

Accuracy measures plus or minus 1 percent , which matches hub and crank-based power meters. Both pedals support field calibration through your Edge computer or compatible head unit. Zero the system before rides to account for temperature changes that affect strain gauge readings. The left pedal communicates with the right pedal, then the left pedal transmits combined data to your head unit. If you're running the pedals on a trainer, make sure both pedals wake up before starting your workout so the trainer sees total power rather than just left-leg data.

ANT+ and Bluetooth communication works with Edge cycling computers, Garmin watches, and third-party head units that support power meter protocols. The system syncs to Garmin Connect for long-term analysis and tracking trends in your cycling dynamics data over weeks and months. Rally RS200 brings power data to third-party apps such as Strava, TrainingPeaks, TrainerRoad and more . Tacx Training app support means you can use the pedals with compatible smart trainers for indoor training. Some trainers let you compare pedal-based power against the trainer's internal power measurement for consistency checking.

Battery life runs up to 120 hours on either LR44/SR44 (x4) or CR1/3N (x2) batteries per pedal. Each pedal has its own battery compartment with metal threads in the pedal bodies for a secure fit with the battery caps . You can replace batteries roadside with the included tool or a coin. The battery caps have been redesigned with upgraded contacts compared to Vector 3 pedals. IPX7 water resistance handles rain, puddles, and wet rides without affecting the electronics.

The 53mm Q-factor (55mm with supplied 2mm washer) matches standard road pedals, and the included washers bump stance width if you need it. Stack height measures 12.2mm , which provides ground clearance for cornering. The 105 kg (230 lbs) maximum rider weight accommodates most cyclists. A 15 mm pedal wrench is required for installation rather than an Allen key. The complete pedal pair weighs 320 grams.