Had a flat this morning, fortunately before I even left the house so I could change the tire in safety & comfort. No problems changing the tube, I was on the road in about 5 minutes.

But about 2 miles in I started hearing a "tick tick" sound that sped up as my speed increased. Then suddenly the bike felt like I was dragging an anchor. I pulled over where it was safe and checked the bike. Sure enough, my rear wheel had slipped a little and was rubbing against the frame and the brake pad. Loosen skewer, re-adjust, back on my way.