Originally Posted by
dvs cycles
And wireless would add extra weight due to more batteries. Better to just have one battery to worry about charging or going bad on you.
Many wireless devices (cadence sensor, HRM, etc.) are powered by the CR2032 battery, which weighs 3.3 grams. Likely the FR and RD wireless would be powered by the same battery as powers the motors. If the shifters need a battery, it wouldn't likely weigh much.