Planet Cyclery is shutting down, and I noticed they had a few 406mm tires. One caught my eye, and I be buying some if I didn't already have a lot of extra rubber on the shelf.
It's the Maxxis Relix. It's a 44mm wide tire, 120TPI, foldable, and 330-360g (depending on who you believe). https://shop.maxxis.com/products/relix
They're available for a lousy $12 each right now:
I've never ridden them. I don't own any. I probably won't own
any. But if I didn't have extra rubber sitting on my shelf, I'd
totally be snagging a few of these. The specs look good, and for
$12 . .
-- John Thurston Juneau, Alaska