Personally would not want 20" rims on a trail. Airing down provides a cushion and better traction, but it needs some tread and sidewall to do that
I use AT tires all over Colorado and Utah and I run them 100% of the time. My Toyo AT's are long lasting, quiet and well behaved on both highway and off road. Tires are a personal preference item. I love my Toyo's and you will get the same view from BFG or NT or Yokahama or other tire owners
There are some trails you could run with street tires like Pole hill or ones that have some rocky parts like Coney Flats.
I use AT tires all over Colorado and Utah and I run them 100% of the time. My Toyo AT's are long lasting, quiet and well behaved on both highway and off road. Tires are a personal preference item. I love my Toyo's and you will get the same view from BFG or NT or Yokahama or other tire owners
There are some trails you could run with street tires like Pole hill or ones that have some rocky parts like Coney Flats.