Hey guys, I ride into work 6 miles 5 days a week. On road and bike paths. I bought a road bike not to long ago and for some reason I get a flat tire every day it seems like. The bike is a giant defy. I do not understand this. Ive tried putting 70 dollar (each) tires. But its not working. I'm thinking of getting thicker tubes because at this rate I'll be buying a new tube every other day. At 8 bucks a tube it adds up. I've also tried putting tire liners in but that does nothing as well. Has anyone else had this problem. Thanks.