Originally Posted by
jackb
When people pass me from behind without saying anything, I say to them that they need to say something. It's quite dangerous to pass someone without alerting the person being passed. When I ride I sometimes swerve a little to avoid something in the road. I also sit upright in the saddle and stretch my arms out to the side just for the pleasure of it. What's the big deal in letting the person you are about to pass that you are on their left? One of these days one of the klutzes will pass me just as I am stretching or leaning to turn the bike a bit and their will be an accident.
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We are also obligated to keep track of what traffic is behind us - with a mirror or a periodic turn of the head.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer