Toward the middle of my ride today I felt what seems like a slight fishtail when cornering. I was careful the rest of the ride not to corner too fast, figuring I may have popped a spoke or something, but when I got home, I found nothing. The spokes are all fine. There is no wobble whatsoever from the wheel. And the tires were inflated to the middle of the recommended range right before the ride. And it happened enough times (or seemed to) that I can't imagine it was sand on the roads, although after a tough winter, that IS a problem so far.) Is there anything else that could be causing it? It wasn't horrible. And quite frankly, I am starting to wonder if I was imagining it, but that seems unlikely since I stated noticing it halfway through the ride and then it seemed like it happened a few times after that. Could worn tires cause it? I admit my back tire is a little more worn than I'd like, but a friend and I are replacing my drive train this weekend, so I figured I would wait until then to put new tires on so I can start the new season totally fresh, and basically consider these sporadic warm April days as a bonus pre-season. (And I accidentally ordered blue side walls to go with my green bike so I sort of want to put them on when I will wear them out quicker.) And the tire isn't terrible. Definitely worn, but not thread bare or anything. And I would think that if they were that worn, I would feel other problems with them, but I didn't. I am not one to take tight corners too fast to begin with, but I definitely want to make sure nothing is wrong, so is there something else I can check.