I went to 17" wheels for the g2.5 Tundra for snows. I wanted to narrow up. That made the Hakka 10 SUVs super cheap at $216ea before the rebate in 265/70/17 which is 31.6" and slightly narrower than stock 275 32" tires. 2679lbs of rated load per tire at a comfortable 35psi. No handling issues!
Hakka 10 SUV is a vastly superior snow and ice tire to any 3PMSF rated AT, worlds better than studdless like DMV2 I drove for 10 years, and markedly better than even the studded LT3 unless you desperately need the E rating and intend to run high tire pressures to achieve a high load rating. I don't. If I went LT3 I woulda gone even narrower.
People forget that E rated tires usually require 80psi to get the rated load (65 for e2). That is a fucking uncomfortable pressure for driving around without a ginormous load in your bed. Folks should use a tire pressure / load calculator to see if their E rated tire can handle their truck at desirable road pressures.
I thought studdless was fine for 15 years, then I went Hakka 10 two winters ago... never going back to studdless.
If you think the KO2 is a good winter tire, then I don't know what the fuck to tell you except you don't know what you don't know. That wasn't even true 9 years ago. In 2015 they were better than most ATs, though still inferior to much older GY Wranglers SAs. KO2s are total crap compared to even studdless snows. The KO3 is better than KO2, but not worlds better, just like the AT3W is markedly better in snow/ice (and a better ride) than its AT4W replacement unless you truly needed that heavy duty load/hauling and mean to run high pressures to get it.
Nokian Outpost nATs in 285/75/18 with its all weather compound but burly carcass and E rating in a 34.8" diam will be my all weather AT summer ride, extends the Hakka 10s life and keeps me good in desert shoulder season. Should fit the Tundra with minimal/no mods using stock 18s with their -60 offset. Nokian OUtpost nATs are by all reports far and away the best AT tire out there for winter conditions, even better than the discontinued AT3W.
On siping, I think I'd look at siping a GY tire since many of theirs are not full depth siping from the factory, which causes remarkably falloffs in winter performance early in their wear cycle. But buying a tire plannning to sipe it means you probably should have picked a better suited tire to begin with!
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