[Matt95]

I'm looking for a little bit wider of a rear tire on my bike. The one I have now only has a couple inches of grip actually hitting the pavement. It's my first bike, so I'm fairly new to all of this. But I carry my girlfriend on the back pretty often, since its my main mode of transportation. Is there ANY bigger size that I can go without having to worry? Or should I really just stick with the size on it?

 

[Easy Rider]

Make sure you keep the air up to recommendation and don't worry about it.
It wouldn't make much difference in load rating anyway.