Originally Posted by
MinnMan
What kind of blowouts? Pinch flats from hitting potholes? Can you give some more details on the rims you are riding and the tire pressure you are running?
The tires were mounted on Fulcrum Racing 3db alloy rims and inflated to 90psi front (the one that blew out) and 95psi rear. The hole was in the tread of the tire, not the sidewall. It appears to have been caused by a sharp object, like a small rock. It was definitely *not* a pinch flat since the tire has a hole in it, there was a pop, hiss, and the tire was flat on the rim before I could even stop the bike, which took about five seconds. I didn't hit a pothole.
FWIW, I rode through the same intersection today with my backup wheels and slowed to see if I could see anything unusual. Nothing No glass, just the usual loose small pebbles and rocks that gather in some intersections, so it had to be a small rock.