These tubes seem really thick and the nylon has been upgraded too along with that sidewall material(Hopefully they learned from the past mistakes and got it right now). Heavy well ya, but I got me some HP to compensate for that, and what on our trucks don't need constant upkeep? I like the idea of being able to go down to 5psi and still go fast and not roll a bead on either side of the wheel. We will see. I am sandblasting my rims and doing a home brew powder coat to keep everything smooth.