Thanks for the explanation. I’ve heard that Toyota is, or can, deny warranty claims on the affected areas of the vehicle when other than stock dimensions are used.
I guess I will give up searching for something that will be the same specs as the stock wheels.
You're very welcome. Thank you for raising good points.
Regarding Toyota warranty claims - I can say that I have never experienced or heard of anyone being denied a warranty claim for aftermarket wheels.
With that said, I can envision a scenario where someone goes into the dealership with a bad wheel bearing, worn out ball joints or bushings, or some similar issue and they were denied a warranty claim because they had installed 37" tires on negative offset wheels with a total assembled weight of 120lbs per corner. In my opinion that would be a reasonable cause for denying a specific warranty claim.
In my opinion it would be a major stretch to deny someone's claim for a suspension component if that person installed wheels with +30mm or even +20mm offset on their Land Cruiser 250.
Why do I feel that way? Because both the 6th Generation 4Runner Trail Hunter and the 4th Generation Tacoma Trail Hunter, which are ostensibly very similar to the Land Cruiser 250 (built on the same platform with some minor differences), come equipped with 18x8.5" +20mm offset wheels directly from Toyota. My argument would be that if those vehicles are factory equipped with 18x8.5" +20mm then the Land Cruiser components should be able to easily handle the same wheel specs.
I really think this is a non-issue though, as warranty denials related to wheel and tire changes (within reason) aren't something I've ever experienced in 20+ years of working with Toyota owners, working with Toyota dealerships, talking with customers who are employed by Toyota (both Toyota corporate and Toyota dealerships) and owning many Toyotas with aftermarket wheels myself.
Unrelated to wheels, but related to bogus warranty denials, I would like to share a very brief incident that I had with my 2005 Tundra back when it was brand new with just a few thousand miles on it. The air conditioning completely stopped working shortly after I bought the truck. I bought it in January 2005, so I hadn't really had much of a reason to use the air conditioning. When I brought it in for the warranty repair the dealership tried to deny the claim because of a few tiny pebbles in the condenser fins. After some back and forth I was able to get them to fix it, but it was extremely frustrating at the time. 20 years later I still have the 2005 Tundra, it has a ton of bent fins with debris lodged in the condenser and the a/c still blows ice cold.
Moral of the story - if they want to try to deny a warranty claim they can find just about any excuse. You just have to push back sometimes.