4iiii

  • Power meter
  • Accurate
  • Lightweight
  • Affordable

Train smarter with 4iiii Powermeters: accurate power measurement for every cyclist

More and more cyclists and triathletes train with power. Not only because it is the most accurate way to measure your effort, but also because you can train more efficiently, track your progress better and peak more precisely for races. 4iiii is one of the global benchmarks in crank-based power meters and combines high accuracy with low weight, excellent reliability and an attractive price.

The Canadian brand was founded with the aim of making power measurement accessible to every cyclist. Thanks to years of experience in sports technology and the development of ANT+ communication, 4iiii today ranks among the most widely used power meters, both in the pro peloton and among ambitious amateurs.

Accurate power measurement for optimal performance

A power meter measures exactly how much power you produce while cycling. This means you no longer train on feel or heart rate alone, but have objective data to optimise your training.

Whether you are working on your FTP, doing intervals, want to improve your pacing in a triathlon or track your training load precisely: a 4iiii Powermeter delivers consistent, reliable data you can trust.

With an accuracy of up to ±1% the latest 4iiii power meters are among the most precise systems on the
market. Thanks to automatic temperature compensation, measurements also stay reliable in a wide range of weather conditions.

Lightweight and virtually invisible

One of the biggest advantages of a 4iiii Powermeter is its compact integration into the crank arm. The sensor is light, aerodynamic and barely visible, so your bike keeps its original look.

Thanks to the minimal extra mass, the weight of your drivetrain stays virtually unchanged, while you have professional training data on every ride.

Compatible with Shimano groupsets

4iiii is best known for its high-quality power meters for Shimano cranks. They are available for various groupsets, so both recreational cyclists and racers can benefit from reliable power measurement.

Depending on your needs, you can choose a single-sided or dual-sided version.

A single-sided power meter measures the power of the left crank and calculates total power from it. This is an excellent choice for most cyclists who want to train accurately
at an attractive price.

For riders who want even more training data, the dual-sided version measures the left and right leg separately. This gives you insight into your left-right balance and an even more complete picture of your pedalling technique.

Easy to pair

4iiii power meters support both ANT+ and Bluetooth, so they work seamlessly with virtually all modern bike computers, sports watches and training apps.

Compatible with, among others:

  • Garmin
  • Wahoo
  • Hammerhead
  • Bryton
  • Zwift
  • TrainerRoad
  • TrainingPeaks
  • JOIN
  • Various other training platforms

So you have accurate power data both indoors and outdoors.

Reliable in all conditions

4iiii power meters are developed for intensive use and extensively tested in a wide range of conditions. From wet winter training sessions to long gran fondos, gravel rides and triathlons: the sensors stay accurate and need hardly any maintenance.

Thanks to high-quality electronics, long battery life and robust construction, you choose a reliable training partner you can count on for years.

Why choose 4iiii?

4iiii combines advanced technology with a user-friendly design and excellent value for money. The power meters are used worldwide by professional cyclists, triathletes and ambitious amateurs who want to base their training on reliable power data.

Advantages of 4iiii Powermeters:

  • Accuracy up to ±1%
  • Compact and lightweight design
  • Compatible with Shimano cranks
  • Single- and dual-sided versions
  • ANT+ and Bluetooth connectivity
  • Automatic temperature compensation
  • Long battery life
  • Suitable for road, gravel and triathlon

Why buy your 4iiii Powermeter from us?

You choose the right power meter based on your crank, groupset and training goals. We are happy to help you select the right 4iiii solution for your bike and make sure you can get started with accurate power measurement straight away.

Whether you are buying your first power meter or upgrading your current bike: with a 4iiii Powermeter you invest in more efficient training, better performance and more insight into every pedal stroke.