Originally Posted by
wphamilton
Most commuting, you often have to use your brakes which wastes all that energy put into accelerating the extra mass. It adds up. Which is why I coast to stops, lazy cyclist that I am.
Right. Some of the energy that was used to accelerate/maintain speed ends up being used to wear down your brake pads and rims/rotors along with producing waste heat.
Think about how many times a typical commuter hits their brakes on the way to work.