The tires in question are bias ply tires, which makes them perfect for tandem axle trailer use. Buy 'em.
From personal experience, I'll never put radials on another multi-axle trailer, ever. Radials tires will not tolerate hard-turn scrub (sideslip mentioned above). It's why the front tire (with very little treadwear) on our Party Cruiser trailer went kablooie while just sitting PARKED at the harbor..
--the sidescrub stretches, wears and tears the cords in the sidewalls and under the tread of radial tires...
But when sideslipping bias tires, the whole tire just slides because the sidewalls don't roll over, and the sliding simply wears and/or peels off the tread, like this tire, one of the 8 year old original Goodyear Workhorse bias tires on our Chaparral trailer-
--this is what the Bullfrog (Lake Powell) launch ramp did to these tires in 100?+ heat over those 8 years. Lots of tread peeled off, but the lowest points of the rubber are still above the groove bottoms. And no internal damage to the tires whatsoever. Plenty safe to get home on...