Very rough approximate conversions. I know you Dean (like I) are a lot more familiar with good ol' standard dimensions on 15" rims...
265/70R16 = 31 x 10.5 (tread width ~8.5")
245/75R16 = 31 x 9.5 (tread width ~7.5")
235/85R16 = 32 x 9.25 (tread width ~7.75")
And our 20/22R, G52/W56, 4.10 favorite (which is just about as uncommon in 16" as 15" unfortunately):
235/75R16 = 30 x 9.5
I hopefully won't have to do anything until next month. Discount went ahead and rotated and balanced my current tires but the tread depth is between 4/32" and 5/32" on all four, so we're talking a matter of a few thousand miles.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein