Last weekend, I flatted on my Saturday morning ride. I was only two miles from home, and was too worn out to change the flat then and there, so I called my wife and had her perform sag duties.

That evening, in the cool of my kitchen, I pulled out the tube and replaced it. The replacement tube had two patches, but they looked pretty sturdy. I generally will patch my flatted tubes and reuse them, so doing this again wasn’t anything out of the ordinary for me.

Sunday morning, I went out to the garage 20 minutes before the club ride was due to begin, and to my horror, found that the tire had gone flat overnight. Yikes! I pulled the wheel from the bike and hauled my tire levers and floor pump into the kitchen again. Then, I grabbed a new tube that was still in its box, fresh from the bike shop.

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