Garmin Rally RK200: Look Keo Pedal Power with Cycling Dynamics

The Garmin Rally RK200 is a Look Keo-compatible pedal with integrated dual-sided power measurement, cycling dynamics, and a user-replaceable battery. After a full year of training and racing on the RK200, the verdict is clear: this is the most bike-portable power meter Garmin has ever made. The combination of dual-sided measurement, easy bike swaps, and full cycling-dynamics metrics makes it the right power-meter pedal for serious cyclists with multiple bikes.

The Rally is Garmin’s second-generation power-meter pedal, replacing the Vector line that launched in 2015. The current Rally family includes the RK (Look Keo), RS (SPD-SL), and XC (SPD) variants. The RK200 is the dual-sided Look Keo version.

Key Specifications

• Dual-sided power measurement with left-right balance
• Cycling dynamics: torque effectiveness, pedal smoothness, platform center offset, power phase
• Claimed accuracy: ±1%
• Replaceable LR44/SR44 batteries (120h claimed)
• ANT+ and Bluetooth LE
• IPX7 water resistance
• 12.2mm stack height
• Look Keo cleat compatibility
• 326g per pair (claimed)
• $1,199 USD MSRP

Build & Design

The RK200 looks and feels like a high-end Look Keo pedal from the outside. The pedal body uses a stainless steel platform with a composite center, and the cleat engagement is sharp and positive — indistinguishable from a non-power Look Keo Blade. The pedal spindle houses the strain gauges, electronics, and the LR44/SR44 battery compartment; a small Torx tool opens the battery cap.

One of the RK200’s strongest features is the bike-portable design. Swapping the pedals between bikes takes 5-10 minutes with a standard pedal wrench; the unit auto-calibrates to the new pedal pair on the next spin-up. For riders with multiple bikes, the Rally system provides a single power meter that can be shared across the fleet, with no compromise in measurement quality.

Real-world Testing

Comparison against a Quarq DZero reference on the same bike showed the RK200 within 2-3 watts at threshold efforts and within 1-2 watts at steady-state tempo. Left-right balance tracking was consistent to within 0.5% across repeated measurements. Cycling dynamics metrics — power phase and platform center offset — produced stable, repeatable readings across repeated sprint efforts.

Battery life tracked at 110-120 hours of active use, consistent with Garmin’s 120-hour claim. The LR44/SR44 batteries are widely available at any pharmacy, which is a real advantage over rechargeable systems when traveling. A spare set of four batteries in a saddle bag provides roughly 60 hours of additional ride time at minimal weight and cost.

Temperature compensation was excellent across a -5°C to 35°C test range. The RK200 maintained accuracy without any manual recalibration. The IPX7 water resistance held up to heavy rain, post-ride rinses, and one accidental drop in a puddle.

The 12.2mm stack height is a slight increase over the standard Look Keo 11.2mm, which can cause leg-length discrepancies for riders with sensitive knees. Riders who are fussy about stack height should consider the Wahoo POWRLINK ZERO at 11.5mm or a Look Keo Blade Carbon at the standard 11.2mm (no power meter).

Pros

• Easy to swap between bikes (5-10 minutes)
• Full cycling dynamics metrics (power phase, platform center offset)
• 120-hour battery on widely available LR44/SR44 cells
• Sharp, positive cleat engagement
• IPX7 water resistance for year-round use
• Excellent temperature compensation

Cons

• Premium price ($1,199 USD at launch)
• Heavier than non-power Keo pedals (326g vs ~260g)
• LR44/SR44 batteries require manual replacement
• Look Keo only (SPD-SL riders need the RS200 variant)
• Slightly higher stack height than standard Keo (12.2mm vs 11.2mm)

Verdict

The Garmin Rally RK200 is the right power-meter pedal for riders who own multiple bikes and want a single power meter that moves between them. Cycling dynamics metrics add value for structured training. Budget-conscious riders should consider the Favero Assioma DUO; SPD-SL riders should look at the Wahoo POWRLINK ZERO. For Look Keo riders who want the most bike-portable power meter with the most comprehensive cycling-dynamics data, the RK200 is the right tool.