Peterbilt 378: pros and cons

There's more to it than just speed rated tires.

And if I have to explain it past that......

 

I personally don't know what they're I'm not a mechanic but I do know if ur engine light comes on and u check it and its a code 93 or 94 that be ur problem power goes right out the window it will feel like early stages of fuel filter clogging and yes of ur motor is an 07 cat acert that would be the problem motor the one I had was a c-15 acert

 

Also yes tires are speed rated 75 is usually the max under a heavy load the o/I u see doing 90 are usually empty or light or just plain stupid

I run a step deck with with low pro 22.5s so I gotta keep here under 75 when I'm loaded especially Texas with heat if I'm empty or very light 75-85 all day long as long as speed limit permits it I to am company driver boss man says forget fuel mileage they're wide open for a reason who am I to argue lol
How else would we know my truck can so 111mph according to GPS hehe