Tires sizes, Can I change

I have a 2000 Ford F150 with 255 70 r16 on it. I found some tires on craiglists with good rims. They are 235 70 r16's. Can I put these on the vehicle? What are the risk etc? Thanks

Here is a link for figuring out what the tire code on the side of your tire means: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=46

But to answer your question...

235mm = approx 9.2 inches.
255mm = approx 10.0 inches.

So you are dealing with a difference of 0.8 inches which is just over 3/4 of an inch, that might be enough to cause some bead sealing problems, but since they are coming with their own rims that won't be a problem.

Something that may cause you problems (if you have driven this truck for a long time) is that the wider the tire is the more grip is has to the road surface and the better handling you will get in corners (to a point) you may feel the 3/4 inch difference or you may not it will depend on your driving style and how well your truck handled in the first place.

thanks torch, its for my son's truck and you know how teenagers are. thanks again.

Here is a link for figuring out what the tire code on the side of your tire means: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=46

But to answer your question...

235mm = approx 9.2 inches.
255mm = approx 10.0 inches.

So you are dealing with a difference of 0.8 inches which is just over 3/4 of an inch, that might be enough to cause some bead sealing problems, but since they are coming with their own rims that won't be a problem.

Something that may cause you problems (if you have driven this truck for a long time) is that the wider the tire is the more grip is has to the road surface and the better handling you will get in corners (to a point) you may feel the 3/4 inch difference or you may not it will depend on your driving style and how well your truck handled in the first place.

It will also make your speedometer off. Probably be reading about 8 mph faster at 60 than it should.