Low cost tires
I am VERY new to biking. I decided to switch to bicycling as my main means of transportation due to gas prices. I recently bought a Windsor Timeline as my introductory bike which came with 700x32c tires. I am currently riding it seven miles a day, five days a week (not bad for just beginning in my opinion.) Herein lies my issue: I am a very large built man. I am 6'5'' 255 lb and have already flattened my back tire. I fear it is due to my large size and figure that I should invest in larger tires that could possibly support my size and weight better. Also, as obvious by my choice in a Windsor Timeline my wallet is a bit pinched and am hoping to stay under $200.
Now according to BD I can fit tires up to 700x42c on the bike and am hoping to find something near that size, perhaps not quite that extreme though. I was hoping there were other brickhouse men that could help me pick out a set of new tires that should fit my needs. And also, if I've been reading correctly the '700' of the 700x32c is the width, correct? So I should be able to buy new tires/tubes and place them on my current rims right? I apologize for being completely wrong if I am, as I said I'm a bike noob.
Any help or insight would be completely appreciated. If what I am asking is completely impossible or just plain ignorant please feel free to tell me.