Revo's and PSI - 2nd Gen

I have done the chalk test several times and not trusting the outcome. Tire shop set them at 35psi. I immediately dropped them to the 29psi recommend in door as a starting point. The chalk wears off the middle (front and back) but not the sides, which would indicate over inflation. Trouble is, I think 29psi is pretty low. Seems like I've read somewhere that 32-35psi is most common. Most of the Revo's I see on cars around parking lots are always worn out in the center/over inflated. Is it possible this tire's design is such that the chalk test is not accurate or should I decrease it even more? They're riding pretty soft as it is. BTW, they're P265/70/17's on a TRD Sport.

Many thanks in advance for the opinions as well as for all the great mods that have taken ALL of my time and money the past two weeks!

 

I set them to 33 on mine and they wear fine, the ride very smooth too

 

I had a set on my Durango I bought when I was 17. I had horribly uneven wear. It was always the right rear tire . Probably had something to do with being 17 and having a V8 and rear wheel drive. Honestly though, they were 265/70r16s and besides my young and dumb driving habits seemed perfect at 32psi. I did the chalk test and all. I don't know what to tell you. I personally wouldn't go lower than 29 or 30 for daily driving.