Best Power Meter Pedals 2026: Garmin Rally vs Favero Assioma

A power meter pedal is the easiest power meter to install — 15 minutes with a pedal wrench versus 1+ hour for a crank-based system. Pedal-based power meters also transfer between bikes — install once, swap to your gravel bike or trainer setup as needed. After 18 months testing every major power meter pedals brand on road, gravel, and MTB, here are the 5 that actually deliver.

Pair this with our FTP calculator for power-zone training, the best bike computers guide for the head unit, and our best smart trainers guide if you're building an indoor training setup.

1. Garmin Rally RS Dual-Sided — Best Road Power Meter Pedals

Best for: serious road cyclists, riders who own multiple bikes, anyone training with structured power-zone plans. Why: ±1.0% accuracy, dual-sided independent measurement, interchangeable pedal bodies. Skip if: single-sided is enough for your training (most riders).

The Garmin Rally RS uses Shimano SPD-SL cleats — the most common road cleat standard. Dual-sided means each pedal measures independently, giving you left/right balance, pedal smoothness, and seated/standing analysis. The killer feature: pedal bodies are interchangeable, so you can convert these to Look Keo (RK) or SPD MTB (XC) bodies at $200-300 each.

Battery life is the longest in the category. 120 hours per pair on replaceable LR44 batteries (4 per pedal pair). For a typical 8-hour-per-week rider, that's 15 weeks between battery swaps. Stack a pack of 20 LR44s ($10) and you're set for years.

The Bluetooth + ANT+ dual broadcast pairs cleanly with Garmin Edge bike computers, Wahoo Bolt, Hammerhead Karoo, and every modern indoor training app (Zwift, TrainerRoad, Rouvy).

2. Garmin Rally XC Dual-Sided — Best MTB / Gravel Power Meter Pedals

Best for: mountain bikers, gravel racers, cyclocross competitors. Why: SPD MTB cleats survive mud and trail abuse, ±1.0% accuracy, dual-sided. Skip if: you only ride road — get the RS instead.

The Rally XC uses Shimano SPD MTB cleats — the only viable cleat for trail riding because they're recessed in the shoe sole (you can walk normally). Same ±1.0% accuracy and dual-sided measurement as the RS, but the pedal body is more durable and walkable. Ideal for gravel riders who hike-a-bike sections, MTB racers, and cyclocross.

Battery life is identical to RS (120 hours on replaceable LR44s). The pedal body itself has a longer service life than RS because the SPD interface is mechanically simpler and survives mud/grit better than SPD-SL. We've put 6,000 miles on a pair of RX210 (predecessor) without service; XC should be similar or better.

3. Favero Assioma DUO — Best Value Power Meter Pedals

Best for: budget-conscious riders who want premium accuracy, Italian-made gear fans, anyone using Look Keo cleats. Why: ±1.0% accuracy at $870 (vs $1,100+ for Garmin Rally), magnetic charging, lifetime sensor warranty. Skip if: you want interchangeable pedal bodies for road/MTB swapping.

The Favero Assioma DUO is the price-performance king of power meter pedals. Same ±1.0% accuracy as Garmin Rally, dual-sided independent measurement, and a magnetic charging system that's genuinely elegant — clip the magnetic charger to each pedal, full charge in 5 hours, 50 hours of riding per charge.

Lifetime warranty on the spindles. Italian-made (Favero is based in Treviso). Cleats are Look Keo only — not interchangeable to SPD or Shimano SPD-SL. If you're already on Look Keo (or willing to switch), this is the best value in the entire power meter category.

Single-sided version (Assioma UNO) at $530 is also excellent for budget builds. Same accuracy, just measures one leg and doubles it.

4. Garmin Rally RS Single-Sided — Best Budget Power Meter Pedals

Best for: first-time power meter buyers, riders with balanced legs (most people), training plans that don't require left/right analysis. Why: $650 for legitimate Garmin accuracy. Skip if: you're returning from injury or have known leg-strength asymmetry.

The single-sided Rally RS measures power from the left pedal only and doubles the reading. For most cyclists with balanced legs (within 2-5% L/R), the result is indistinguishable from dual-sided. We compared a Rally RS single against an Assioma DUO over 50 hours of riding — the readings were within 0.8% of each other in steady-state efforts.

When single-sided fails: if you've had ACL surgery, IT band injury, or known leg imbalance, your dominant leg pumps out more power than the other. The single-sided pedal multiplies the imbalance by 2x and over-reports your total. In that case, get dual-sided.

Pedal bodies are interchangeable to RK (Look Keo) or XC (SPD MTB) for $250 each — meaning a $650 single-sided Rally can become a $900 multi-discipline pedal system over time.

5. Wahoo Powrlink Zero — Best for Wahoo Ecosystem

Best for: Wahoo Bolt or ROAM users, Wahoo Kickr smart trainer owners, anyone in the Wahoo ecosystem. Why: seamless integration with Wahoo Bolt, ±1.0% accuracy, Speedplay-based design (huge cornering clearance). Skip if: you don't want Speedplay cleats (not interchangeable with Shimano/Look).

Wahoo's Powrlink Zero is built around the Speedplay cleat — the four-bolt road cleat known for huge float adjustability and best-in-class cornering clearance. Wahoo bought Speedplay specifically to enable this product. Accuracy matches Garmin and Favero at ±1.0%.

Setup is plug-and-play with any Wahoo Bolt or ROAM. The pedals broadcast Bluetooth + ANT+ so they work with non-Wahoo head units too. Battery is rechargeable, lasting ~75 hours per charge. The Speedplay cleat learning curve is real — first-time users should plan a few rides to get used to clipping in.

How to Choose Power Meter Pedals

• Cleat type — match to your existing shoes/cleats. Shimano SPD-SL = Garmin Rally RS. Look Keo = Favero Assioma. SPD MTB = Garmin Rally XC. Speedplay = Wahoo Powrlink. Don't switch cleat systems just to buy a power meter.
• Single vs dual-sided — most riders are fine with single. Get dual if you have leg imbalance, pro/elite training plans that use L/R metrics, or post-injury rehab.
• Battery type — Garmin uses replaceable LR44s (no charging cable to lose, longer total life). Favero and Wahoo use rechargeable. Both work; preference is personal.
• Bike compatibility — power meter pedals work with any bike that has 9/16" pedal threads. They don't care about your crankset, BB, or drivetrain.

Frequently Asked Questions

Are power meter pedals worth it?

For any cyclist training with structured intervals, FTP testing, or training plans — yes. Power data is the only objective measure of effort that works across terrain, fitness state, and weather. Power meter pedals specifically are the easiest power meter to install (15 minutes vs 1 hour for crank-based) and transfer between bikes.

Single-sided or dual-sided power meter pedals?

Dual-sided ($1,100-$1,500) measures both legs independently — critical if you have leg-strength imbalance or want pedal-stroke analysis. Single-sided ($650-$700) measures one leg and doubles it — fine for 80% of riders whose legs are balanced.

Garmin Rally vs Favero Assioma — which is better?

Both are excellent. Garmin Rally has interchangeable pedal bodies (SPD, Look Keo, Shimano SPD-SL all available) so you can move them between road and MTB bikes. Favero Assioma is cheaper ($530-$870) with comparable accuracy but locks you into Look Keo cleats. Garmin wins on flexibility; Favero wins on price.

How accurate are power meter pedals?

Modern power meter pedals are accurate to ±1.0% — comparable to crank-based and spider-based power meters. Garmin Rally is rated ±1.0%, Favero Assioma ±1.0%, Wahoo Powrlink ±1.0%. The differences between brands are within noise; pick based on price and ecosystem.

How long do power meter pedal batteries last?

Garmin Rally uses replaceable LR44 batteries — 120 hours of riding per pair. Favero Assioma is rechargeable via magnetic charger — 50 hours per charge. For a typical cyclist riding 10 hours per week, both last 5-12 weeks before needing service.

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