Thinking about this, I don't see how 2 riders differs from 20 or 200 riders...
Pat (Dinqua) gave us the best common-sense answer to this 2 NY rallies ago - if you can't see the face of the rider in front of you in his mirror - you're too close. I think he called it the 2 second rule or something...
I gotta quit quoting him - his helmet won't fit anymore..
