Personally I've found Terra Grapplers to degrade in road performance based on tire pressure. I never had any problems with non-LTs on one of my trucks because I never inflated it over ~38psi. But I had LTs on my wrangler, and would notice poor road manners especially in wet when hyper-inflated for the trails. I always attributed that to the fact that they lack any straight channels in the middle meat of the tire, unlike many other tires. Just look at the center of the Grapplers, the channels are in a Z pattern, not a nice straight or semi-straight path at all. And as such, I noticed they performed fine when aired down, but horrible when aired up - So I always kept them aired down below 40psi when not needed. And never had a problem after that, with them on 1 truck and two Wranglers.