I confess to not keeping up with the maintenance sometimes on the bikes. I pick the one that's working best and ride it. Sometimes I even ignore obvious problems until things go fully south on me. So, the Big Dummy hasn't been shifting so well lately. I've ridden it anyway. It's perfect for what I need to do around town getting groceries and hauling things like The Boy. Finally, I went to fetch 'er up in the garage and noticed a flat rear tire, so I picked a different bike that day - and the next. Two weeks go by and…