I'm a regular city cyclist. Most of the time, you won't need a helmet. But on the very low number of occasions you do need one, they will save your life. It'

I'm a regular city cyclist. Most of the time, you won't need a helmet. But on the very low number of occasions you do need one, they will save your life. It's worth wearing one just for these occasions. I've come off my bike unexpectedly twice. One at low speed, one at higher speed (~30mph). Both were due to diesel spills on a wet road surface which were not visible. In both cases the loss of traction on a corner or lane change meant an immediate slip and contact with the road surface, and due to the momentum carrying your body forward, that does mean your head smashing into the road just after your arm causing your body to rotate on impact. I walked away with a fractured finger and a grazed chin. Without the helmet I'd have either died or had a severe head injury. I've unfortunately known several friends and acquaintances who either died immediately or who died after coming out of comas after having accidents while not wearing a helmet. It's these events which have caused me to always wear one, and they have saved my life on a few occasions. While cars have sometimes been involved, mostly these events occurred without the involvement of any other vehicle (other than people selfishly brimming their tanks while filling up, only to have it spill out on corners). People have even got brain damage falling sideways off their bikes while stationary. Wearing a helmet, for me, has been something I will always do after seeing the consequences of not wearing one.