Yes inside and outside look the same. The tire pressure is around 35-36 PSI when they are HOT. Cold pressure is around 31 PSI.it could be several things, like too much toe in on your alignment, too much positive camber, etc.
if this looks the same on the inside of your tire, then it's caused from underinflation.
Isn't that overinflated? The owner's manual says 220 kPa cold, which is 32 PSI. Which becomes about 240 kPa (so 35 PSI) when they heat up in warm season. So your 35 cold becomes about 37 PSI, which is definitely overinflated.You are underinflated if you are setting the tires at 31 PSI cold. Personally I run mine at 35 PSI cold.
Nothing matters beyond cold inflation. A warm tire can vary significantly based on air temp, pavement temp, and elevation. If you set your pressure at sea level then climb 5,000 ft you will see a 2-3 PSI increase from the elevation change alone. If you set your pressure at 6 am in the desert at 40 degrees then without driving check it in the afternoon at 90 degrees you will see a 5-10 PSI increase. The max cold pressure on the sidewall takes all of this into account. Not applicable to an MDX per se, but I've dealt with customers who had a 1 ton truck where the rear tire max was 80 PSI and the door sticker for the rear was also 80 PSI. He was watching the TPMS as he was driving (while towing) and freaking out because they were hitting 85+ PSI, so he stopped and adjusted air pressure back to 80 PSI. The load capacity for the tire is calculated at max pressure, so he was effectively reducing the max capacity on the tire when he reduced the pressure. Not good when you are approaching max GCVWR with a huge 5th wheel camper attached.Isn't that overinflated? The owner's manual says 220 kPa cold, which is 32 PSI. Which becomes about 240 kPa (so 35 PSI) when they heat up in warm season. So your 35 cold becomes about 37 PSI, which is definitely overinflated.
My 05' TL ate front tires, no matter what I did. Always wore on outside and inside edge, had it aligned 3-4 times a year. I gave up rotating tires and just let it eat the fronts. My 13' MDX was doing the same, just not as bad. I make sure to rotate often, and have Firestone "lifetime alignment", so hopefully this recent set of tires will last longer than the year old, old set. I swear it's an Acura thing as well, haven't had this issue on any other of the crap load of vehicles I've owned over the decades.Is the wear on all four tires or just one axle set? I did lifetime alignment with Firestone when I purchased my 11 MDX adv used back in 2014 and it has paid for itself since. The alignment usually has 1/4 of the adjustment point in the yellow/red when I take the MDX back 1-2 times a year. I also do re-balance/rotation or X-rotation every oil change (lifetime with Discount Tires). I also keep my PSI around 34-36 range.
If the alignment/suspension checks out and the wear is only on the front left tire, it could be just from normal driving? I've noticed this issue with all my Acura cars and that is why I upped the tire rotations. Most left hand turns are long, slower, and sweeping (like from the left turn lane at a stop light). Right hand turns can be be at a sharper angle or higher speeds (90 degree right turns at stop signs or 90/270 degree curved hwy on/off ramps).