Okay squad, I'm here to learn from my mistakes: yesterday during the course of a 100km gravel fondo I flatted out three times. One flat might be bad luck, but three flats leaves me thinking it's due to rider error. All three times it was the back tire, and I've checked the tire for damage, but it seems okay.

The first flat was coming over a bridge with an exposed lip. I think I hit the lip at speed and the edge hammered the wheel pretty hard. As it turns out, a guy from the pointy end of the field was already fixing a flat at the same spot, and I think he also hit the bridge wrong.

The second flat was on a descent, I was trying to avoid potholes the whole way, but wonder if I was overweight on the back tire and just hit a divot too hard?

The third flat was a more gradual loss of pressure, so maybe a pinch flat from installing the second tube too hastily?

There were others out on the course with flats, including at least one rider with two or three flats as well, but instead of blaming the course or my gear, any thoughts on what I could improve? Tire pressure was on the higher side, but not pumped up like a road or a tri tire. What else could it be? Please don't spare my feelings!