Tires Maxxis or Achilles

If you liked the XR4 the Rekon is probably the closest, or Ardent. It's worked well for me everywhere I've taken it from Duluth to Moab, and everything in between.

Dissector front, Aggressor rear. All the grip you ever need unless you are a DH pro - and way faster than DHF/DHR

The Assegai has the best climbing traction I've ever had (used to run DHRIIs, which would be a good option as well).

After some time, I’ve discovered the Dissector is particularly sensitive to tire pressure. After I dropped the pressure a couple of psi (I’m running the 2.4WT version on a 35mm inner width 29” rim, and have settled on 24-25psi), the Dissector is running great.

I put about 10 laps on a set of Achilles all seasons on stock power at my last drift event and the tires still look new. I had heard bad things about Achilles but so far so good for me.

Achilles tires are really lightweight and can take some abuse

I had gotten some Achilles Desert Hawk UHP tires, they were really good for the price and held up a good while.

I've gone from XR4s to DHR/DHF. If there is an increase in rolling resistance, the only place I think I notice it is when I'm on a very gentle downward slope, and I wonder if I'd accelerate due to gravity a little faster on the XR4s. On the other hand, when I'm doing steep technical climbing in the saddle, and putting down the kind of power that made the XR4 lose traction, the DHR has never spun out.

For Maxxis exo I couldn't go below 25 in the rear without bashing my rim and getting flats.

If you've got the OE supplied tires on ANY trailer, I'd make a VERY strong recommendation to swap them out for a reputable brand as soon as possible.