The first time I saw a brake rotor draw blood was with my old dog Seamus . Seamus loved to chase bikes, he was a great dog. A black and white border collie lab, he was born in Crested Butte and later honed his bike dog skills on the singletrack trails of Bend, Oregon. I wouldn't say he was cuddly and loving, he was more like a heroin junkie jonzing for a fix. As soon as he saw me or any other human he would find some item to drop at your feet and begin begging you to throw it. He would lift the stick or slimy tennis ball up and try to spit it into your hand. If you hid the ball he would find a stick. If you hid the stick he'd find a rock. He was relentless. His lower teeth were chipped and broken from his fetching habit and he kept himself in constant motion, desperate to chase or retrieve. He was a dock jumper, frisbee catcher and bike chaser. The first bike he learned to chase had Vee brakes. So neither of us were expecting what happened when he chased me on my...