Hankook Dynapro ATM RF10 tires in 20"?

My brother has them on the back of his work van for snow tires. They seem to be holding up OK for all the weight he carries.

I think that is what I run in winter, studded, on the back of my little S10, the rest of the year its dynapro HT on my S10. But I put like 5000 on the S10 per year so I can't tell you how long they last.

I could see maybe the dynapro HT on my 3500 dually because of the price.
but that truck only has 12K miles in 18 months so hopefully 6 tires are a long way off.