dogjaw, I assume since your on a "X" your running mostly road (@ 70mph)? If so 4-6 Lbs under Max which is 33psi for a 270 (have the same tire) off road take it down to 18-20psi, but don't forget to air up when you return to hard surface. You may also need to check steering stem bearing for looseness and tighten up a little. Also if the Kenda is well worn but not so much to change out; recut the leading edge of the lugs(square them up) or take the tire off and reverse the tread pattern. Let us know if you alleviate your problem.