How and where does the power meter fit on my bike?
Since a power meter is usually to be mounted on an existing bicycle or integrated into the drivetrain during assembly, the question of installation inevitably arises. The range extends from very simple (watch out, right-hand thread on the pedal!) to complex bottom bracket salad with chainring crux.
In this context, the path of least resistance is taken with a pedal power meter. The current models from renowned suppliers (Favero, Garmin, Powertap, SRM) no longer require alignment or special torques except for SRM and can be screwed in like a normal pedal. However, the simplicity of installation is paid for by the exposed position of the power meter. The pedals are often the first place to be affected by a crash and often strike at the end of a curve, especially when it comes to criterium races. The pedal bodies can usually be replaced without any problems and the measuring electronics are located in the axle, but pedals just take more than other components. The Favero Assioma should be praised at this point. In contrast to its competitors, the electronics of the Italian pedal are not completely integrated into the axle. The circuit board and battery are located in the "knob" very close to the crankarms and are excellently sealed against water and dirt. With the integrated rechargeable battery, there is no need to worry about changing them.
Crank systems are a little more conversion-extensive, however there are some differences: With a one-sided system, normally only the left crankarm has to be replaced - which means loosening and tightening three bolts. If the bicycle is equipped with a Shimano crank, the installation of a Stages LR or Shimano power meter crank isn’t an issue. These are Shimano cranks, which were only given a power meter afterwards. Crank out, power meter in. The bottom brackets can stay in the bicycle. Be careful with direct mount brakes on the chainstay: Due to the special design of the frames, there is only little space between the rear triangle and the crank on some models. Since the power meters are glued on the inside of the cranks, it is absolutely necessary to check whether there is enough space between crank and chainstay. Otherwise the frame and the power meter could be damaged.
If your bike is equipped with a SRAM groupset and crank, installing a QUARQ crank is just as easy. Here you should only check in advance if you ride a BB30, GXP or DUB crank and choose the power meter accordingly.
For Rotor brand systems, make sure you use a bottom bracket for 30 mm axles, as the INPower axles do not fit in 24 mm bottom brackets. Our team in the service department will be happy to help you at this point. If you change the chainrings - and thus the gradation - at the same time, you should also check and adjust your front derailleur.
In summary, if you are going to be moving the power meter from bike to bike, then pedal based systems are the way to go.