I put the 31" x 10.5 x 15 Yokohama Geolandar A/Ts on my truck in November, for winter. They are on the stock rims.
I think I do not want to mess around with 16" rims. I notice that your former rims have all those bolts farther out from the center than the ones that hold the wheel on. I have those on a VX from Japan, and this is where it gets weird.
The Toyota manual asks for the 225/75? tires, and what my truck had was a 26" (slightly higher, maybe an inch) than a 225.
"Someone" wanted to try Nokian (drivable in summer) winter tires on the VX (which I believe is made to run on 31" tires, but the manual is all in Japanese). The RPM and speedometer were so far off that I put the 225 Nokians onto the "other" domestic LC (1986 automatic).
The tire shops here in Quebec were swamped in November because of a new law requiring winter tires on just about every vehicle (some exceptions). All they would do for me was swap the rims (so the domestic now has those VX rims, and there is a difference).
I do not know if the rims are wider or what, but the "decorative" front hub cover will not fit between the VX rim and the domestic hub... so the covers are now on the VX... I wondered if everything would "work" okay, and it seems to, except that the 225 Nokians on the VX rims... well, one went flat to the ground (suddenly). They said it was all fixed up, bead seal and all, no leaks, blah, blah.
Two days ago it went completely flat again!
My plan is to get all 8 tires off, put the rims back where they belong, remount all 8 tires (smaller tires on the domestic, 31" on the VX).
My own 1987 5-speed has the Yokos, and I prefer them to the smaller tire. I don't much care about the automatic. It is not destined for me to drive... it is for someone else. It drives just fine. I think I am getting more total top speed with the larger tires on my truck.
Anybody know what it is with those rims? The ones with more holes, more bolts.
... and ... I like the Yokohamas in snow. I like everything about them. I also use the GPS to test speedometer accuracy... off by about 4% with the 31" tires on the domestic LC. I would be going about 104 kph when it reads 100 kph. Smaller tires on the VX caused a 10%+ error in the other direction. Very high RPM, doing 100 when it reads 110+