Even that WTB Venture it doesn’t look like the tread is really any wider than the casing.
It is on mine.
I could see it working for a skinny tyre if the tread is narrower than the sidewall section width. But in any case, it's a confusing way to designate a tyre size.
That makes sense for a knobbly tyre, not so much for a slick.
Even that WTB Venture it doesn’t look like the tread is really any wider than the casing.