It's Chromoly, can't find the exact tubing but probably reynolds. The frame is strong and light. It's 700cc and I just ordered a new set of tires. I'll run 90psi for roads and deflate for offroad to take some shock out and give traction.

Any psi ratings for light trails?

Also, I've tested the ride out in a dirt field, when over loose rock it was killer, but beaten path and smooth slopes was better then suspension