This Monday I had a set of LT275/55R20 installed on my truck. The stock tires where P275/55R20. Last night on my way home from work I was hearing like a rubbing sound cold that be the LT tires. Also when I apply the breaks you have it them grind. On the first day I had them on I didn't hear anything.

 

Sounds like you need new brakes...you installed the same size tires...why would they be rubbing.

 

I didn't know if the LT made a difference. I take a look at the breaks next week.

 

if your brakes are making a grinding noise .. I would check them ASAP

 

Is there a difference in tire pressure between LT and P. My door calls for 36 psi

 

Yes, I keep my LT's at 55lbs with a empty truck. They can go up to 80lbs. Read the side of the tires. I know my tire sensors indicate a low tire with the idiot light at 45lbs or lower.

 

Just for curiosities sake, check the Lug Nuts to be sure they are tight. A few years ago I had a '91 Tracer LTS 5-speed. I had a set of Snow tires put on a set of stock steel rims, and had the set installed for winter. On the way I home I felt a vibration in the front end. Thought maybe a tire was balanced incorrectly. The next day I went out to run some errands and the vibration got worse. So when I got home I looked at the tires for a bubble in the sidewall. That's when I noticed a lug was noticeably sticking out further than the others. I was able to grab it with my fingers and turn it by hand. Holy Crap! So I jacked the car up and discovered that ALL the lugs were loose, at all four corners! and on the front tires half were only hand tight. So, I always check my lugs now. Might be something for you to check........

 

Speaking of lug nuts. I had all of them replace. All 24 out side case of my lug nuts where crack in half and they where replace with ford oem ones. I'll look it still.

 

That depends on whether the LT's are load range C or load range E. A load range C maxs at 50 PSI. And 40 PSI is a good unloaded pressure.

 

Well I pop off drive front tire. Looks like nothing rubbing. The break pad tho needs to be replaced its down a lot