Best Power Meter Pedals for Triathlon 2026: Garmin Rally vs Favero Assioma

Why Power Meter Pedals Work for Triathlon

Power meter pedals have one key advantage over crank- or hub-based systems: they move between bikes in minutes. That matters for triathletes who train on a road bike and race on a TT bike, or who split sessions between an indoor turbo setup and outdoor rides. Swap the pedals and your power data follows you. For most triathlon scenarios — one or two bikes in regular rotation — pedal-based power meters are the most practical option available.

Key Features to Consider

  • Single vs dual-sided — Single-sided pedals measure left-leg power only and double it for total power; dual-sided measure both legs independently. Dual-sided data is more accurate and reveals left–right imbalances, which can matter for injury prevention and bike fit.
  • Cleat compatibility — Most power meter pedals are Look KEO or Shimano SPD-SL compatible. Make sure your choice matches your cleat and shoe system.
  • Battery life and charging — Look for 50–100+ hours between charges or battery changes. Running out mid-session is avoidable; pick a system with practical battery life.
  • Accuracy — Most reputable power meter pedals claim ±1–2% accuracy. For training purposes, consistency matters more than absolute accuracy — just make sure you always use the same unit.

Our Top Picks

Best Overall: Garmin Rally RS200 Power Meter Pedals

The Garmin Rally RS200 is a dual-sided, Shimano SPD-SL compatible power meter pedal system. It delivers left and right power independently, total power, cadence, and cycling dynamics (torque effectiveness, pedal smoothness, platform centre offset) — more data than most triathletes will ever use, but available if you want it. Accuracy is rated at ±1%. Battery life is excellent: approximately 120 hours from a pair of standard AAA batteries. Compatible with Garmin Edge bike computers natively, and via ANT+ or Bluetooth with most other head units and training apps. Currently available at £689.99 on Tredz (reduced from £869.99 — check Tredz for current availability and pricing).

Check price on Tredz — Garmin Rally RS200

Best Alternative: Favero Assioma DUO

The Favero Assioma DUO is the most respected alternative to Garmin in the pedal power meter category. Also dual-sided, it uses a Look KEO-compatible pedal body (compatible with most triathlon shoes via an adapter) and claims ±1% accuracy. The rechargeable battery design is a notable differentiator — USB-C charging rather than AAA batteries, with 50+ hours per charge. Widely available from specialist UK cycling retailers at around £449–475. Not currently stocked on Tredz, so check your preferred specialist cycling retailer for availability and current pricing.

Buying Tips

  • Start with dual-sided if your budget allows — left–right power balance data is genuinely useful for identifying pedalling asymmetries and monitoring fatigue
  • Check cleat compatibility before buying: Garmin Rally RS200 uses Shimano SPD-SL cleats; Favero Assioma DUO uses Look KEO (or Shimano via adapter)
  • Power meter pedals add a small amount of weight and Q-factor; this is rarely significant but worth noting if you run very narrow stance width in your bike fit

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