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What is a Powermeter for Road & MTB?
A powermeter is a performance measurement system that is mounted on the bike. The Powermeter has the function to measure the power you generate by pedalling. You can then display this power on your bike computer or fitness watch while riding. A power meter turns every bike into a mobile ergometer. All measured values can also be recorded with the bike computer and can thus be evaluated in detail after training or competition.
Do I need a power meter?
In cycling there are many measured values that are used to evaluate the training intensity (heart rate, speed, feeling, lactate values, etc.). Ultimately, however, all these values are only the reaction to the load (power in watts).
The Powermeter enables you to record this load in watts at any time. This makes it much easier to control the load during training and competition. A power meter is useful for all performance classes. From our experience even hobby sportsmen and newcomers to cycling profit extremely from these training systems, because they usually lack the experience values with regard to the correct load and they can otherwise hardly assess it correctly.
What types of powermeters are there?
The measuring principle is very similar for almost all bicycle powermeters. The measuring technology of most powermeters consists of strain gauges, which allow a very accurate measurement of the torque. The power in watts is then calculated from the other measurement data (power = force x distance : time). Therefore, all power meters supply the cadence in addition to the power in watts, as this is required for the calculation. The difference, however, is the placement of the sensor in which the measurement technology is installed. In our Powermetershop you will find all current Powermeters.
1. pedal power meter: Well-known products for pedal power meters are the Favero Assioma Duo, the Garmin Vector 3 and the PowerTap P2 power meter. The SRM Exakt Powermeter is a new addition. All current pedal power meters are based on the Look Keo pedal system.
2. crank arm / crank star / spider : The SRM Powermeter was already developed in 1986 by Ullrich Schoberer and the measuring technology is still based on the same measuring principle in the field of crank spiders. Jim Meyer's Quarq Powermeter also uses a similar measuring principle. These crank powermeters are still characterized today by an extremely high measuring accuracy and reliability. With the Stages Powermeter and the Rotor Powermeter, the measuring technology is installed on or in the crank arm. With the new Rotor INPower Powermeters, the measuring technology is installed in the bottom bracket.
3. inner bearing: Already the ergomo Powermeter had installed the measuring technology in the inner bearing at the beginning of the 2000s. However, the system was never able to assert itself properly and is no longer available. With the Rotor INPower, this location for measurement technology has now been taken up again. In principle, the bottom bearing axle is also very suitable, as it protects the sensitive measurement technology very well. Also with the Easton and RaceFace Cinch Powermeters, the measurement technology was placed in the bottom bracket axle.
4. hub: With PowerTap G3 Powermeter the measuring technology is built into the rear hub. This measuring system is also very proven. However, the demand is currently no longer so high, as the system is built into the wheel sets.
5. chainring: For the PowerTap C1 Powermeters PowerTap chooses a measuring location that no other manufacturer uses in this form. The measuring technique is directly in the chainring. However, this system has not yet established itself.
The right headunit
In order to use the Powermeter optimally in training and competition you need a compatible bike computer. The Garmin bike computers and the Wahoo bike computers have proven themselves in practice. Lezyne bike computers, O-Synce bike computers and the SRM bike computers are also very suitable for use with a power meter. Also fitness watches like the Garmin fitness watches are partly power meter compatible and are used especially in the triathlon scene. The end devices are also designed for evaluation with Strava and Garmin Connect. We will be happy to advise you on the selection of a suitable headunit for your power meter.