To allow wider tyres than the originals fitted to the original rim from new, requires some thought.:nenau
Rims are manufacturered for a range of tyre widths that are approved.
You need to establish the actual rim width of the wheel, which is normally stamped on them. eg 6J usually means a rim width of 6 inches.
Tyres are manufactured to be allowed to fit on different rim widths.
CAUTION... NOT ALL tyre manufactures with the same width tyre will have the same aproved rim width range, all this I found out when I up sized to 235/75r/15's some time ago.
Avon rangers were ok, also some others, BUT if I was changing to another suppier even for this size, I would have to first check.
So check your rim width, then go onto the manufacturers web site for the exact brand, type size etc, then look at the Rim widths approved for the tyre, then if you are within range, then legally they can be fitted, others will tell you if you need to trim anything...
If you have an accident, no matter who is to blame, even though the tyres were not to blame, and the tyres were not compatible with the rim, then you are deemed to have an unsafe vehicle, and the insurance may not pay out, and you could be charged by the police etc etc.
Doesn't take two minutes to check, at least those other followers of this thread might not be aware of this issue, so worth a check.
Oh and changing tyre widths is seen as a Mod, so must be declared to your insurance company. I had no problem with mine, as I could prove that the later Mavs and Terranos had this size fitment as standard.
Rustic