I personally ride a Specialized Allez. Started out at 380, down to 317 (as of this morning). I did not replace the stock wheels, and they are still true and have had no spoke issues. I do not ride it like a mountain bike, though...no jumping curbs, and avoid big holes, but rumble strips and "normal" road unevenness...I ride in some industrial areas, big trucks are HARD on pavement. and have (knock on wood) never even flatted...of course, as soon as I say that, I will flat on the way home tonight.