Collection: 4iiiiii

When you want to take your training and performance to the next level, accurate data is one of the most important factors. 4iiii (pronounced "four eye") is a Canadian brand that specializes in power meters, heart rate monitors and cycling electronics with a focus on precision, low weight and ease of use. Their solutions are among the most popular in both the leisure and elite fields, because they deliver high-quality data at a competitive price. 4iiii's best-known products are their crankset-based power meters, which are available as single or dual measurement - i.e. with a sensor in one or both pedal arms. Whether you're training for an Ironman, racing in the B class or just want to keep track of your zones, 4iiii is a brand that deserves your attention.

4iiii's power meters are among the most widely used in professional cycling – including by World Tour teams like Israel–Premier Tech. And for good reason. Their technology is based on precise strain gauges that measure the force you put into the pedals with an accuracy of ±1%. The sensor is discreetly located on the inside of the crank arm and adds only a few grams, making it ideal for riders who don't want to compromise on weight or aesthetics. You can choose between PRECISION (single-side) or PRECISION PRO (dual-side), depending on your need for data from one or both legs.

One of the great advantages of 4iiii's power meters is that they can be integrated into existing cranksets. Many models are offered pre-assembled from the manufacturer – for example on Shimano Dura-Ace, Ultegra or 105 – but you can also have your own crank arms sent in and have the sensor installed by 4iiii's technicians. This provides flexibility, and means you can keep your preferred setup while still gaining access to advanced performance data.

Ease of use is another big plus of the 4iiii. Installation requires no special tools – the sensor is already mounted and ready to use. Simply pair it with your bike computer or training app via ANT+ or Bluetooth and you're good to go. 4iiii's power meters are compatible with all major platforms, including Garmin, Wahoo, Zwift, TrainerRoad and Strava. This makes them ideal for both outdoor training and indoor sessions on the home trainer.

The sensor's battery life is also impressive – you can expect up to 100 hours of use on a single CR2032 battery, which can be easily replaced without any special tools. What's more, the sensor is IPX7 waterproof, meaning you can ride in rain, sweat and mud without compromising on reliability or longevity. Whether you're using it for daily training, FTP tests or competitions, the 4iiii delivers the stability and security you need.

There are many reasons why 4iiii has become a preferred choice among both exercisers and professionals. Firstly, you get accurate wattage measurement at a price that is often significantly lower than the competition. Secondly, you get a lightweight and discreet solution that easily integrates into your existing setup – and finally, you get a product with proven reliability and support from a brand that collaborates with some of the world's best cycling teams.

At Transition Zone we sell selected 4iiii power meters, and we are ready to guide you in choosing a model and crankset. Whether you are looking for an entry into watt-based training or want to upgrade your current equipment to dual-side measurement, we have the solution. Our team also helps you with installation and calibration, so you are sure to get the best start. And if you need help understanding your watt data, we are also happy to help with training guidance and optimization.

Come by the store and experience 4iiii for yourself – or order online with fast delivery straight to your door. With 4iiii you get reliable measurement, professional technology and maximum value for money.