Hi all. Very new to road cycling. I'm 6'-6" and 265lb. I have been on 5 rides (15-20 miles each) now with my new bike and have had to replace a tube on every one. I usually run around 95-105 psi in the tubes. I'm sure my weight has a lot to do with it, but is this normal? I just ordered some of these which I hope will help. Anyone have a similar experience or suggestions?