Rob, P235 70R15's work out to 27.9527559055 inches diameter.
after a little recalculating, these seem to be the closest...
P255 60R16's work out to be 28.0472440945 inches
P245 60R16's = 27.5748031496
P275 55R16's = 27.9094488189
I'd stick with either the P255 60R16's or the P275 55R16's. They are
extremely close to the original diameter of the tire. The P255's will
say you're going a little faster than you actually are; and they will
increase the height of your truck by about 0.05". The P275's will say
you're going slower than you actually are; and they will lower your truck
by about 0.02". Either way would look the same (in terms of height), that
is, unless you've got real good eyes!
BTW, in case you are wondering how I figure out these sizes, I use the
formula:
((Width of tire)*(Aspect ratio)*2*0.03937007874)+Wheel Diameter
^^^^ converts mm to inches
Anyway, Hope this helps..
Jeff
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