Best Triathlon Power Meters 2026: Pedal, Crank and Spider Options Compared
What to Look For
A power meter is the single most valuable training tool for triathlon cycling. It gives you objective, real-time data on how hard you are working — independent of terrain, wind or fatigue. For pacing the bike leg in triathlon, nothing else comes close to preventing the dreaded blow-up on the run.
Key Features to Consider
- Type — Pedal-based meters are the easiest to install and swap between bikes. Crank-based meters are lighter but require compatible cranksets. Spider-based meters are the most accurate but also the most expensive.
- Single vs Dual-sided — Dual-sided meters measure both legs independently, giving left/right balance data. Single-sided meters estimate total power by doubling one leg, which is accurate enough for most triathletes.
- Accuracy — Look for ±1% to ±1.5% accuracy. All three picks below meet this standard.
- Battery — Rechargeable (Favero) vs replaceable coin-cell (Garmin, Stages). Rechargeable is more convenient; replaceable means you are never caught out mid-ride.
Our Top Picks
Best Overall: Favero Assioma DUO
The Assioma DUO is the best power meter for most triathletes. Dual-sided measurement with ±1% accuracy, rechargeable batteries lasting 50+ hours, and dead-simple installation — just swap your pedals. It works with Look Kéo cleats and connects via Bluetooth and ANT+. At around £550, it undercuts Garmin’s pedal options significantly while matching them on accuracy and reliability.
Best Value: Stages Power L (Shimano 105 R7000)
If you are on a Shimano drivetrain and want to keep costs down, the Stages left-crank power meter is hard to beat. Single-sided measurement with ±1.5% accuracy, it adds virtually no weight and fits any frame with a Shimano Hollowtech II bottom bracket. Available from around £280, it is the most affordable way to train with power.
Best Premium: Garmin Rally RS200
Garmin’s Rally RS200 is the premium pedal-based option, offering dual-sided power measurement with Shimano SPD-SL cleat compatibility. It provides advanced cycling dynamics including power phase and platform centre offset data. Battery life is an impressive 120 hours on replaceable coin cells. It is the most feature-rich option, though at around £950 it commands a premium over the Favero.
Buying Tips
- For triathlon, pedal-based power meters are ideal because you can swap them between road and TT bikes in minutes
- Check your cleat system before buying — Favero uses Look Kéo, Garmin Rally RS uses Shimano SPD-SL
- Calibrate (zero offset) your power meter before every ride for the most accurate data
Care and Maintenance
Keep pedal threads greased to prevent seizing. Rinse pedal-based meters after wet rides and dry thoroughly. Update firmware regularly via the manufacturer’s app. Avoid dropping or knocking crank-based meters when removing wheels.
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