He's a big boy (about 210 lbs) who was riding thinner and thinner tires (down to 21's). We were also riding on gravel sometimes--one particular trail was two separate blow outs (Hamburg). He's gone back to 23's-25's with more tread (will only buy Continental or Michelin tubes). And we've given up the Hamburg (they've opened a new trailhead for our favorite route, so we don't need this shortcut anymore).

I'm afraid my flat may have been a pinch-flat. I usually only need to air up my tires every other day. DH aired up my tires yesterday, and after thinking about it, I said "if the back is good, the front is good." Then, this morning I didn't air up my tires I ran over something I didn't see until I went over it--SO probably my fault. Another lesson learned--AIR UP MY TIRES EVERYDAY.

Our floor pump just started acting up--seems to leak air as you pump?! Maybe it wasn't my fault