Quote Originally Posted by DebW
The only way to track this down is to analyze every single flat and try to determine the cause of each. First obvious place to look is the rimstrips in his wheels, if the tubes are always punctured on the rim side. Even if they don't obviously look bad, replace them if they are old. Are the flats always the same distance away from the valve stem? Find that spot on the rim and look for metal burrs. The fact that your wheel flatted too could be a coincidence, but where was the puncture in your tube? What brand of tubes are you using? Some of the ultralight tubes are not very reliable. What size tires, what pressure, and how much does your husband weigh? If you are much lighter than he, you can get by with more than him in terms of pressure variations.

Or you could give up and get this guy solid rubber tires.
Hi Deb--He weighs about 60 lbs more than I. We discussed this as a possible reason, that perhaps the extra weight is somehow driving the tube up into the spoke hole. I keep the tires at the low end of the pressure recommendation (~100-110 psi). Should they be at the higher end for him? (He weighs 190.)