On a non-lifted, stock LC200, the p-metric 265/70/18 is by far my favorite choice on a stock 18"x 8" wheel. Hear me out:
1. The 265/70/18 is 1" taller than the stock 285/60/18, yet is a lighter tire than the 285 by 2-3lbs in most cases.
2. This being the lighter tire choice means less unsprung weight, which results in better acceleration and braking.
3. The slightly thinner contact patch (-1" to -1.5") creates less rolling resistance, typically resulting in a quieter ride and better fuel economy.
4. 265/70/18 is a very common modern tire size (OEM size of LC250, et al) and a less expensive tire overall because of demand (and it's less raw material).
5. The 265/70/18 is by no means a "skinny" tire. I would argue that the somewhat 'bro' tendency to want to go bigger (i.e. 285/65/18) has skewed the default choice the wrong direction. And tire shops would rather sell you a $363 285/65/18 than a $278 265/70/18 (current Michelin Defender LTX M/S2 prices) - so they will tend to coerce you into the bigger tire.
6. Your fenders do the work they were designed to do. No weird amounts of sidewall poking out, no rubbing, and no scrub radius increase.
This is my second LC200 in 7 years. I've ruminated for days and weeks on the perfect stock tire size modification, and am finally convinced that going "taller and narrower" with a 265/70/18 is the way. Not many are doing it. This size captures a timeless, purposeful look, and performs without compromises. If you spend most of your time on decent roads, resist the urge to get heavier, fatter tires which could easily taint (and possibly even ruin) everything you love that's refined about our LC200s.