Rear Tire Wear

Time for the OP to end this mystery and come clean. There is a lot, and I mean of lot of bad speculation on this post. I saw the issue immediately. There is no defect in the tires. This is not an alignment issue (you simply cannot align the rear) and it sure as hell isn't an air pressure issue. Shame on you all for once again suggesting the completely stupid chalk test. He got stuck on something and spun the tires. You can see the ridge cut in the tread block on the first pics. He got some traction on that outer edge and it got hot. Very hot. This is why he didn't see it on his previous tires. This is why it is only on the rear.

 

A pic to clarify the clear line mentioned in these posts

 

Genius . You nailed this .

 

haha whatever man.

 

Wonder what it could it be rubbing on? There is hardly anything in the rear wheel well especially with a lift. I feel like the OP would have seen this on day 1

 

Not sure, but I think the point is it seems to not be wear from tire pressure or alignment, but something else alltogether. Whatever it may be.

 

If it is rubbing, I am sure he would hear it, but it is possible. Every rub I have had heard sounds like your truck is being ripped apart. He may not have had the rub before because his tires were worn and his new ones have 1/2 more tread. Who knows, maybe he had it over loaded and the tires caught something, but usually your bump stops would hit before your tire hit the bed. This is on the rear so it isn't like it only happens when you turn.

It looks to me like he spun them on something. I have seen that where people get caught in a storm drain and spin trying to get out. In any case it is clear that this is a self created issue and not something he is going to get replaced for free.

 

How long do you have to drive with diff locked to achieve this?

 

Totally convincing retort...
I'll I'm asking is where you get a 2 psi bias. Not 4, 6 or 8 psi; but 2 psi. Surely you have a good reason...that you didn't pull out your ass.

Whatever, indeed....

 

Im sure the manufacturer has calculated the ideal pressure for that size along with their choice of wheel size. Not everyone is going to use that precise combo but the tire will fit most any 17 inch wheel within reasonable variances of width. These variations in width should cause the tire to deform differently, possibly causing the tread to lay differently, given the pressure is constant for each example (wheel sizes 17x8, 17x9, 17x10…etc @ 37 psi)

The end user needs to figure out what specific tire pressure works best for their setup. Hence the chalk test. I said I use 2psi based on my chalk test. The OP will likely have his own pressure settings based on his setup.

If you can calculate this precise pressure better than a chalk test, have at it. I cant…

 

After recently going from P to LT tires, I had to quickly get up to speed on tire pressures. Tire PSI is basically the same across all manufactures and based on tire construction/ load rating.

https://tirepressure.com/tire-pressure-calculator

Our stock P rated 265/65/17 have a cold pressure recommendation of 29psi (check door jam info). By the calculation above, LT tire pressure should be set at 40psi to handle same load.

OEM Tire Size P265/65R17 (SL 110) with load capacity of 2149 lbs. @ 29 psi.
When a P-metric or Metric tire is installed on a pickup truck, SUV or van, you must discount the replacement tire’s load by the 1.10 factor to ensure that the replacement tire has sufficient load capacity by inflation to support the load of the originally installed tires based on the expectation that passenger type tires may experience more severe loading and usage conditions when applied to light trucks. That brings the effective tire load capacity down to 1954 lbs.

New Tire Size LT265/70R17 (E 121/118) with load capacity of 2075 lbs. @ 40 psi.
New tire LT265/70R17 has sufficient load capacity at its specified inflation level and can be used to replace P265/65R17 tire.

 

I'll pass, thanks anyway.

 

here is the weight of each corner of my 2019 DCSB with the factory tonneau cover on it.

 

I havnt seen the OP report back so I’ll side with your assessment. Sorry to shame you sir we’ll do better next time.

 

Shipmate, It is all speculation at this point. We could even speculate that the OP is too embarrassed to reply knowing that he has been outed or maybe even he was trying to get some suggestions as to how he could put doubt into the tire shops mind that this wasn't self inflicted and a defect that he could get someone else to pay for. I guess we will never know...