Sorry for a similar set of questions but have a slightly different ask than here:
forum.ih8mud.com
and here:
forum.ih8mud.com
Just purchased a 2014 LX, and thought I was ready to go big with E rated AT tires, and thus found a decent deal on 4 of these Tundra 18s that had Toyo Open Country 275/70/18's on them with about 30% tread left to test out. Loved the look but don't think I can tolerate the highway noise which is where the majority of my driving takes place. My off-road use at least initially will be forest service roads and light trails.
I wanted 33's and thought I had narrowed it down to the Michelin defenders and continental terrain contact A/T (and maybe BF trail terrains) which seem to strike the balance I am looking for in a tire. The issue is to get the P rated version of these in 33's I would have to go back to the factory 20's as best I can tell. (P rated in r18 max out at 32in?)
My presumption is that the added weight and durability is not worth the tradeoff in more rotating mass and loss of road performance. (Is it fair to say that tread pattern and weight contribute roughly equally to performance loss?)
My other concern is I only bought 4 of the tundra 18's. If I decided to go with the 275/65/18's is there any concern keeping the original spare as long as the external diameters are the same/similar?(weight differences etc.) I also like the idea of doing a 5 tire rotation which is another plus in sticking with the stock rims. I do think I would have to dip, wrap or powder coat them as its too much chrome for me as is.
Any thoughts or advice would be much appreciated!

Toyo Open Country AT3 (E-rated) / Continental TerrainContact (P-rated) comparison
In November 2019 I had the Continential TerrainContact (P-rated) tires (size 275/65 R18) installed on my mostly stock 2014 Land Cruiser (only addition is King Shocks, that's it). I wrote about how I really liked them here in this post. I would buy them again except that they failed off-road...


Using a spare tire that's one size up or down from the other three in an emergency
I'm installing my Dissent rear bumper and will move my spare to the swing out. I'm considering carrying a second spare in the stock spare tire storage location. Ultimately, I would buy an additional 17" wheel and matching tire but I have my OEM wheels/stock size tires just sitting in my...

Just purchased a 2014 LX, and thought I was ready to go big with E rated AT tires, and thus found a decent deal on 4 of these Tundra 18s that had Toyo Open Country 275/70/18's on them with about 30% tread left to test out. Loved the look but don't think I can tolerate the highway noise which is where the majority of my driving takes place. My off-road use at least initially will be forest service roads and light trails.
I wanted 33's and thought I had narrowed it down to the Michelin defenders and continental terrain contact A/T (and maybe BF trail terrains) which seem to strike the balance I am looking for in a tire. The issue is to get the P rated version of these in 33's I would have to go back to the factory 20's as best I can tell. (P rated in r18 max out at 32in?)
My presumption is that the added weight and durability is not worth the tradeoff in more rotating mass and loss of road performance. (Is it fair to say that tread pattern and weight contribute roughly equally to performance loss?)
My other concern is I only bought 4 of the tundra 18's. If I decided to go with the 275/65/18's is there any concern keeping the original spare as long as the external diameters are the same/similar?(weight differences etc.) I also like the idea of doing a 5 tire rotation which is another plus in sticking with the stock rims. I do think I would have to dip, wrap or powder coat them as its too much chrome for me as is.
Any thoughts or advice would be much appreciated!