Power Meters Reviewed

Note > The power meter products below are listed in approximate price order, lowest price first.

It wasn't many years ago that talk of monitoring a cyclist's pedaling power output was limited to pro cyclists and their training team. A power meter for a bike cost in excess of £3000 in 2010. How things have changed. It is now possible to get an accurate power meter for under £600. Power monitoring is now the accepted standard performance metric for most serious / competitive cyclists. Ask 95% of top flight Tour riders what their FTP (Functional Threshold Power) or Power Zone 3 is (Power Zones) and they will quote their latest power output figures.

The Science of Monitoring Power

The main component in measuring a rider's pedal power is a strain gauge. A strain gauge's resistance changes when force is applied to it. As the cyclist pedals these changes in resistance are converted to electrical signals. These signals are then transmitted wirelessly via a transmitter to a receiver unit, normal a bike computer, smartphone or wrist watch for further analysis.

Different Styles of Power Meter

There are various locations within a bike's drivetrain where a power meter can be installed. Because of this the power meter has evolved in various designs, styles and systems. The most popular power monitoring systems are (listed in order of ease of installation):

  1. Pedals (Garmin, PowerTap, Look)
  2. Crank Arms (Stages, Rotor, 4iiii)
  3. Crank Spider / Chainring (Quarq, SRM, Power2Max, PowerTap)
  4. Rear Wheel Hub (PowerTap)

Further Considerations

Other than the specific style of power meter there are two other primary factors that need to be considered before parting with your cash.

  1. Single Sided or Total Power Output?
  2. Bluetooth or ANT+ data transmission?

Several of the pedal and crank based power meters give the option of single sided power monitoring only (normally about 40% cheaper) or dual sided for total power output. The single sided option will give an average Total Power Output by doubling the single sided readings. The choice of transmission systems depends on the brand of watch / bike computer. For example, bike computers from Garmin, Bryton and Lezyne use ANT+, whereas Polar & Suunto support Bluetooth 4.0.


 
  • SIngle Sided Power Metering
    Power meter - ANT+ compatible
    Power Meter - Bluetooth and ANT+ compatible
    Smartphone Connectivity supported by training Apps
    Power - compatible with optional Power sensors
    Cadence - provides wireless pedal cadence from optional sensors

    Stages 105 Power Meter

    An easy and cost effective alternative to the power meter pedals of PowerTap and Garmin. The Stages 105 Power Meter cranks have their strain gauge and transmitter built-in to the rear side of the pedal. This is a SINGLE sided solution. The Stages 105 power cranks transmit in both ANT+ and Bluetooth ...

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  • SIngle Sided Power Metering
    Power meter - ANT+ compatible
    Power Meter - Bluetooth and ANT+ compatible
    Smartphone Connectivity supported by training Apps
    Power - compatible with optional Power sensors
    Cadence - provides wireless pedal cadence from optional sensors

    4iiii Ultegra Power Crank

    A very popular single sided power meter. The 4iiii Precision Power crank transmits power and cadence data to any compatible ANT+ or Bluetooth 4.0 (Smart) device. A genuine Shimano Ultegra crank is used to house the sensitive 4iiii strain gauges that provide the accurate power measurement ....

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    Lowest Price today ...

  • SIngle Sided Power Metering
    Power Meter - both sides monitored
    Power meter - ANT+ compatible
    Smartphone Connectivity supported by training Apps
    Power - compatible with optional Power sensors
    Cadence - provides wireless pedal cadence from optional sensors

    Garmin Vector 2 & 2S

    Riding within a power zone is an proven method of ensuring you get to the finish line with just an ounce left in reserve. For the competitive cyclist, monitoring pedal power is now a MUST rather than a nice to have. Garmin offer the Vector 2 S for single sided power meter and the dual sided Vector 2 to measure power output on both cranks ....

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    Lowest Price today ...

  • Power Meter - both sides monitored
    Power meter - ANT+ compatible
    Power Meter - Bluetooth and ANT+ compatible
    Smartphone Connectivity supported by training Apps
    Power - compatible with optional Power sensors
    Cadence - provides wireless pedal cadence from optional sensors

    PowerTap P1 Pedals

    Similar in design to the Garmin Vector 2 power meter pedals the PowerTap P1 pedals offer ease of installation and dual sided power monitoring. The PowerTap P1 pedals are simple to fit and provide the same proven PowerTap accuracy and reliability found in their cranks ...

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  • A Brief History…

    It all started in 1996. As a sports science student I wanted to promote the use of Heart Rate Monitors in exercise. The business went online in 1999. In 14 years we sold HRM's to over 300,000 customers.

    After a short retail back we're now back with the new online store selling ONLY Polar. We still offer impartial advice & test other heart rate monitor brands. Our aim however, is to introduce you to Polar's products as an alternative to Garmin, Fitbit, Suunto or TomTom.

    Get in Touch

    • Email

      info@heartratemonitor.co.uk

    • Phone (orders / support)

      (+44) 01485 505 000

    • Post

      7 Lincoln Square
      Hunstanton
      Norfolk
      PE36 6DW