If only I had a LBS... I currently live in a horrible little town called Sterling, Colorado and the closest thing we have to a bike shop is Walmart... Really... But I took the tube out and inflated it and found the hole. I think it was just a bad tube, definitely not weight related. Today I'm going to get a walmart tube just so I can commute still, but I plan on buying two good tubes online. I'm hoping that will kind of stop this from happening in the future. Are there any tube brands that you guys recommend?