I've had stock size Nokian Rotiiva ATs on my SR5 for around 8000 miles. I've really liked them. P rated, 115 weight rating, 'snowflake' symbol, T speed rating, 13/32s tread depth, full 31.7" diameter, very light (37 lbs), nice tread width ~8.7". They don't get a lot of love on this forum, but...