Best Cycling Power Meters UK 2025

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Cycling power meter crank arm on a road bike

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 PRO RS-2, Dual-Sensing Side Pedal Based SPD-SL Roa…

UNIVERSALLY COMPATIBLE: A revolutionary pedal-based power meter for road 100% SPD-SL compatible. You can use it with the…
INNOVATIVE MODULAR DESIGN: All the electronic components and the integrated rechargeable battery are safely stored withi…
EASY TO INSTALL: Install and move your Assioma power meter from one bike to another just like a normal pedal, easily and…

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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.

Favero Assioma PRO RS-1, Single-sensing Side Pedal Based SPD-SL R…

UNIVERSALLY COMPATIBLE: A revolutionary pedal-based power meter for road 100% SPD-SL compatible with power sensor on the…
INNOVATIVE MODULAR DESIGN: All the electronic components and the integrated rechargeable battery are safely stored withi…
EASY TO INSTALL: Install and move your Assioma power meter from one bike to another just like a normal pedal, easily and…

£454.20

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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.

VENLAB Digital Multimeter, TRMS 6000 Counts Auto-Ranging, DC AC V…

🛡️【𝐌𝐔𝐋𝐓𝐈-𝐅𝐔𝐍𝐂𝐓𝐈𝐎𝐍】Digital Multimeter measures up to 750V AC voltage, 1000V DC voltage, 20A AC/DC current and resistance,…
🔧【𝐖𝐈𝐃𝐄 𝐑𝐀𝐍𝐆𝐄 𝐨𝐟 𝐔𝐒𝐄】 This digital multimeter is an excellent choice for various electrical troubleshooting tasks. you ca…
🧰【𝐄𝐀𝐒𝐘 𝐨𝐟 𝐔𝐒𝐄】Suitable size and read quick easy with backlight in lower light conditions or dark spaces. A strong magnet…

£29.99

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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.

Neewer 22″ Magic Arm w Desk C Clamp, Overhead Mount with Articula…

【Magic Arm with Super Clamp】 Crafted from robust aluminum alloy, the low profile but super grip boom arm camera mount su…
【Articulating Arm with Ball Heads】 The two section friction boom arm offers a 55cm/22″ extended length, and is equipped …
【For Both Flat Surfaces and Tube Rods】 The V grooves and pivot tips of the desk camera mount securely grip flat surfaces…

£28.55

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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.

WAHOO Fitness SPEEDPLAY NANO Pedal System

Titanium Pedal System – The featherweight, podium-ready SPEEDPLAY NANO delivers every advantage on race-day.
LOW WEIGHT – High Standards. Low weight – A mix of premium titanuim and carbon fiber makes up the SPEEDPLAY NANO, a feat…
STACK HEIGHT/POWER TRANSFER – Every Watt Matters – SPEEDPLAY NANO transfers power more efficiently than the competition …

£379.99

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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.

Buying Guide

A cycling power meter measures the force applied to the pedals or drivetrain and converts it to watts — the objective, real-time measurement of cycling output that is unaffected by heat, fatigue or perceived effort, making it the gold standard training tool for UK cyclists aiming to improve performance. Power training allows precise intensity management across the full range of UK conditions, from flat fens to mountain climbs, ensuring every training session serves a defined physiological purpose.

Factor	What to Look For
Measurement Location	Power meters measure at different points in the drivetrain: pedal-based (Favero Assioma, Garmin Rally), crank arm (Stages, 4iiii), spider-based (Quarq, SRAM), and hub-based (PowerTap). Pedal-based meters are the easiest to transfer between bikes — important for UK cyclists who split time between a road bike and turbo trainer. Crank arm meters are the most affordable; spider-based meters offer the highest accuracy but are groupset-specific.
Single vs Dual-Sided Measurement	Single-sided power meters measure one leg and double the result to estimate total power, assuming a 50:50 left-right balance. Dual-sided meters measure both legs independently, providing left-right balance data that reveals asymmetries useful for injury prevention and bike fitting. For most UK training purposes, single-sided accuracy of ±2% is sufficient; cyclists with known left-right imbalances or returning from injury benefit from dual-sided data. Dual-sided models cost £100 to £250 more than single-sided equivalents.
Accuracy	The industry standard for power meter accuracy is ±2% or better across the full power range. At 250 watts, a ±2% error equals ±5 watts — negligible for training purposes. Temperature compensation is critical for UK use where a morning calibration at 5 degrees Celsius followed by a three-hour ride through varying conditions can introduce drift in uncalibrated meters. Check whether the meter performs a dynamic temperature calibration or requires a manual zero offset at the start of each ride.
Connectivity and Compatibility	All power meters transmit via ANT+ and most now also support Bluetooth LE, allowing connection to both cycling computers (Garmin, Wahoo, Karoo) and smartphones running apps such as Zwift, TrainerRoad or Apple Health. Confirm compatibility with your head unit before purchasing — some proprietary configurations from older Polar and Bryton computers may not support all power meter brands.
Battery Life and Type	CR2032 coin cell batteries (Stages, Quarq, 4iiii) are inexpensive and widely available, making mid-tour replacement straightforward. USB rechargeable meters (Favero Assioma, Garmin Rally) offer 60 to 100-hour battery life but require a charging cable in the field. For UK bikepacking and audax riders, coin cell replacement is more practical than finding a USB charging point in a remote bothy; for day riders and commuters, rechargeable meters are more convenient.

Frequently Asked Questions

Are power meters worth it for amateur UK cyclists?

Power meters provide the most objective training data available and are worth the investment for any UK cyclist with performance goals — whether that’s completing a first century ride, improving a sportive time or targeting a local time trial series. Power enables you to train precisely in defined zones, pace long climbs correctly (preventing the most common sportive mistake of going too hard too early), and track fitness progression objectively over the UK’s variable seasonal training conditions. Entry-level power meters start at around £200 for single-sided options; the training value significantly outweighs the cost for any cyclist training more than six hours per week.

What is FTP and how do I test mine?

FTP (Functional Threshold Power) is the highest average power output you can sustain for one hour and is the reference point for defining power training zones. The most common field test is the 20-minute maximal effort (multiply the average power by 0.95 to estimate FTP) or a dedicated ramp test available on platforms such as TrainerRoad and Zwift. UK cyclists typically test FTP every six to eight weeks to track progress. A beginner cyclist might have an FTP of 150 to 200 watts; a trained club rider 250 to 310 watts; a competitive amateur 320 to 380 watts; a professional 380 to 450+ watts.

Can I use a power meter on a turbo trainer?

Yes — a pedal or crank-based power meter works on a turbo trainer and is the most accurate measurement option when using a dumb or fluid trainer that does not have its own power measurement. Smart trainers (Wahoo KICKR, Tacx NEO) have built-in power measurement, but external power meter data is typically more accurate than trainer estimates, particularly at low cadences or during sprints. Using the same external power meter on the road and turbo trainer ensures continuity of power data across all your training sessions, which is important for accurate zone calculation.

What power training zones should I use?

The most widely used zone system for UK cyclists is the seven-zone system derived from Andrew Coggan’s work: Zone 1 (Active Recovery, below 55% FTP); Zone 2 (Endurance, 56 to 75% FTP — the base of most UK training plans); Zone 3 (Tempo, 76 to 90%); Zone 4 (Threshold, 91 to 105% — key for sportive and time trial pacing); Zone 5 (VO2 max, 106 to 120%); Zone 6 (Anaerobic, 121 to 150%); Zone 7 (Neuromuscular Sprint, above 150%). UK sportive riders benefit most from extended Zone 2 base work in winter and Zone 4 threshold training in spring ahead of the events season.

How do I calibrate a power meter?

The procedure varies by type, but the general process involves performing a zero offset (or null calibration) at the start of each ride: most head units prompt for this automatically or have it in the sensor settings menu. Allow the power meter to reach ambient temperature before calibrating — performing a zero offset in a warm house before riding out into cold UK winter air will give an incorrect baseline. Pedal-based meters require the same crank position for calibration on every ride. Some meters self-calibrate continuously during coasting; confirm whether your model does this in the manufacturer’s documentation.

What is the best budget power meter for UK road cyclists?

4iiii Precision single-sided power meter (around £250, factory-installed on a Shimano 105 or Ultegra crank arm) represents the strongest budget option for UK road cyclists. Stages LR single-sided and the Favero Assioma Uno (pedal-based) are competitive at a similar price point. The Garmin Rally RS200 dual-sided pedal meter (around £700) is the leading mid-budget dual-sided option for Shimano SPD-SL cleat users. The Wahoo POWRLINK ZERO (around £600) is the LOOK KEO cleat equivalent. Avoid buying second-hand power meters without verifying calibration history and checking for impact damage to the strain gauges.

Does weather affect power meter accuracy?

Temperature changes are the primary environmental factor affecting power meter accuracy. Most modern power meters use temperature compensation algorithms to maintain accuracy across a range of conditions, but a significant temperature change (more than 10 degrees Celsius) during a ride can still introduce small errors in less sophisticated meters. Performing a zero offset after the bike has been outside for five to ten minutes — rather than immediately from a warm indoor storage — improves baseline accuracy. Rain does not directly affect power measurement in properly sealed meters, but check your specific model’s IP rating before using in sustained heavy UK rain.