[knowtheory]

It should also be noted that cars have a number of safety devices which bicycles do not, airbags, seat belts, crumple zones, and so on.

Cars also travel under different conditions from bicycles as well (certainly not many highway bicyclists), and as such i would presume that motorists would be involved in many more high speed crashes (although data on that would be interesting to see).

So comparing injuries on bikes to injuries in cars definitely seems like an apples to oranges comparison at first blush.