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Training with power is the most precise way to measure cycling effort and track fitness improvements over time. Power meters have become more affordable in recent years and there are now excellent options across all budgets. Here are the best cycling power meters available in the UK for 2025.
Top Picks
Garmin Rally RS100 SPD-SL Power Meter Pedals
The Garmin Rally RS100 uses a pedal-based power measurement system that makes installation and transfer between bikes effortless. The single-sided RS100 measures left leg power and doubles it for total power — adequate for most training purposes at a significantly lower cost than dual-sided options. Compatible with standard 3-bolt SPD-SL cleats used by most road cyclists.
Favero Assioma DUO Power Meter Pedals
The Assioma DUO is widely considered the best value dual-sided power meter available. It measures both legs independently, provides Cycling Dynamics data and is accurate to within plus or minus 1%. The rechargeable battery via USB-C is far more convenient than coin cells and the pedals move between bikes in minutes. An outstanding choice for data-focused cyclists.
4iiii Precision 3 Left Arm Power Meter
4iiii take a different approach by attaching their power meter to the non-drive-side crank arm. The Precision 3 is remarkably light (adding less than 20g), accurately measures power via left-arm measurement, and fits a huge range of compatible cranks including Shimano 105 and Ultegra. An excellent entry point into power training.
Stages Power Meter Left Arm
Stages was among the first to offer consumer crank-arm power meters and their track record of reliability and accuracy is exceptional. The Gen 3 unit is weather sealed to IPX7 and provides accurate left-arm power measurement. Available pre-fitted to a wide range of Shimano and SRAM cranks, making installation a matter of swapping the entire crank arm.
Wahoo SPEEDPLAY POWRLINK ZERO Dual-Sided
Wahoo’s POWRLINK ZERO integrates dual-sided power measurement into the Speedplay pedal platform, which has a devoted following among cyclists who appreciate its walkability and float adjustment. Accurate to plus or minus 1% and compatible with Wahoo ELEMNT computers for seamless data integration. A premium option for committed Speedplay users.
Buying Guide
Single versus dual-sided: dual-sided meters measure each leg independently and cost more. For most training purposes, single-sided accuracy is sufficient, especially when starting out with power training.
Compatibility is paramount. Crank arm power meters must match your specific crank model. Pedal-based systems are more transferable between bikes but add more weight.
Accuracy ratings of plus or minus 1 to 2% are adequate for training. Laboratory-grade accuracy matters less than consistent measurements that let you track changes over time.
Battery type affects convenience. Rechargeable units (Assioma, Rally) are more convenient than coin cell replacement. Consider how easily you can recharge on your normal riding schedule.
Data analysis software subscription costs add up. Ensure your power meter works with your preferred cycling app — TrainingPeaks, Strava and Wahoo ELEMNT are compatible with all the options above.
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Final Thoughts
The Favero Assioma DUO offers the best combination of dual-sided accuracy, convenience and price for most cyclists. For single-sided options, the 4iiii Precision 3 and Stages units are highly reliable and widely used among UK club cyclists.