Young people who have found the balance in life know that you never forget how to ride a bike. Old guys who are unbalanced know that you never forget how to run after a bike. That’s the lesson I learned when I huffed, puffed, sprinted and stumbled while trying to keep up with my granddaughter Chloe as she whizzed down the street on her shiny new bicycle. I had a bike as a kid and fell on my head before helmets were mandatory, which I use as a feeble excuse for why I still act like a kid. But unlike Chloe, who’s 9, my riding these days is done on a stationary bike at the gym. “Does this thing h…