Interfaces
Older cycling power meters use a set of wires to transmit power information to a computer mounted on the bicycle; this system has a serious disadvantage of having fine electrical cables being run all over the bicycle, making it harder to clean as well as using a fair number of fasteners to hold them up. However since 2009 there is a general trend to move towards wireless systems . The most popular wireless system is ANT+ by ANT. Currently, Garmin, Quarq, Power2max, SRM (Schoberer_Rad_Meßtechnik) and PowerTap have deployed this interface for various purposes on the bicycle.
Read more about this topic: Cycling Power Meter