TomHaycraft wrote:
So ... when highway patrol cites someone for being over-weight, what is the basis? What do they use to judge the truck or trailer is too heavy?
Besides the federal standard on weights for tire width you also have your registered weight.
My previous truck was a Tundra with a 7200 lbs GVWR. In Maryland you can register to either 7000 lbs or 10,000 lbs. If I registered to 7000 lbs, I would be "overloaded" if I loaded to the max GVWR of 7200 lbs.
Instead I registered my truck for 10K lbs. That means that LEGALLY I could go over my 7200lbs GVWR and my truck could weight up to 10K lbs. I had E rated tires, so my tires were rated to 12K lbs. I could have LEGALLY towed a fifth wheel with 3500 lbs of tongue weight. I would have destroyed my truck and it would have been a horrible riding experience... but it would have been perfectly LEGAL.
There is a huge difference between "legal" and "safe/smart" though. That's why I laugh when the internet attorneys start spouting off about legality and weights. Vehicle gross vehicle weight rating is nothing more than a warranty number. Your state department of motor vehicles will let you register your vehicle for substantially higher GVWR than your manufacturer intended.