Quote Originally Posted by Kalidurga View Post
kimikaw, if you would really feel more comfortable with wider tires, you could also consider a cyclocross bike. They work perfectly well on the road, often have sturdier tubing than road bikes, and can fit tires up to 32. I've got a Specialized Tri-Cross that's been adjusted to have a touring-type fit and it makes for a very comfortable, sturdy road ride.

And Oakleaf's right. Bicycling Magazine frequently runs articles about folks weighing 300+ pounds getting into cycling. You're a feather compared to that, so definitely don't worry about your weight. I would think that the two most important things to consider are the type of riding you plan to do and whether the bike's geometry can be adjusted for your comfort.
Agreed on all of this. My boyfriend was over 300lbs when he got himself a very solid Cannondale cross bike just over a year ago. That actually came with knobby 700x35s. After a while, he switched them out to slick 700x28s (which I also did on my Trek FX).

Anyway, he looooves his cross bike (which he rides exclusively on the road). And he's lost 40lbs so far.