If you have tires inside a vehicle not mounted, in a container then there shouldn't be an issue.
They might say 'You can't use them here', but they can't control what you do with them after that.
I've used 2 sets of JDM tires, one set was Grantrek winters, best winter tires I've EVER used on the
TransCanada Highway on a 60. Probably not legal, but no one checks.
If you have identical Toyo's that we sell here there shouldn't be an issue; has anyone ever actually
seen the 'DOT' emblem on a tire to confirm legality?
Subject change: Siping. Like OK tire does, really helps on slippery stuff here, and in winter. BUT,
the Toyo's took a s***kicking on the Dempster / Tuk trip this summer. The hard lava mixed with
blast rock granite just chunked them really badly. I've had to rebalance them and they still have a
bit of a vibe. After my spare tire broke off and I had to drive over halfway back to Tuk to find it,
(funny story!) I had a long talk with a tire guy in Inuvik. They stopped siping tires because of the
chunking and the really nasty rock. Now it's not like slow off road traction up there. It's hundreds
of kilometers of highway speed and lots of sideways movement and hard steering adjustments on
the fly just eats the siping away. So I'll probably swap to a non siped tire for the northern trips,
but still recommend siping for here. It does really help on the aired down off road stuff.
I've run my MT's as low as 12 psi fully loaded 6000+ lbs, they flex really well but never give it
up sideways. They perform really well.