Weird Serpentine Belt Issues on 2 Hondas

[Ang]

I've got 2 V6 Hondas. One has 1000 miles on its serpentine belt, Napa brand, and it's shredding at the side of it. Could have original 180k mile tensioners, not sure. The other one, has a Continental belt with 1200 miles on it. This one has uneven wear straight down the middle. Definitely has its original 100k mile tensioner.
I'm putting a new Bando on to replace the shredded belt, I don't use the car but if I do I don't want to lose the belt, I'm not spending money on tensioners now.
The other is my daily, so it's getting a new Litens (which should be OEM for Honda?) Tensioner and a Bando belt.
Something weird I noticed though, is that these 2 Bando belts are wider than every other belt I have around.
The Continental and the napa appear to be the thinnest in width, the duralast I have is in-between, and the Bando is the widest. And these belts are all identical for these 2 cars with the only difference being length as one has hydraulic power steering. It kind of looks like the car could handle a wider belt, but it's hard to tell. Is there any reason that these Bando belts are wider? And why one is in-between?
Some of them share part numbers while looking different so who knows they may all just be made by gates or something.

 

[SC Maintenance]

If there shredding something is out of align or some bearing is failing.

I wouldn't worry about the width of the back of the belt - what matters is the location an depth of the ribs.

 

[Ang]

If there shredding something is out of align or some bearing is failing.

I wouldn't worry about the width of the back of the belt - what matters is the location an depth of the ribs.

Probably. I'll have to check everything when I replace the belt.
The belt that was on it before this one was on it for like 2500 miles and didn't have any issues, it was replaced under warranty for developing a crack.

The ribs are all the same, only other difference is the Bando isn't gatorback.

 

[Hall]

Guarantee you, the pulley manufacturers specify a belt width with +/- width allowance.

I highly doubt the belt width is your issue though. What you're seeing is almost always because of a bad pulley.

 

[Ang]

Guarantee you, the pulley manufacturers specify a belt width with +/- width allowance.

I highly doubt the belt width is your issue though. What you're seeing is almost always because of a bad pulley.

I didn't say it was, the belt thats being shredded is in the group of the thinnest width belts. though the 2 pulleys hit the back of the belt, so they are flat and shouldnt be able to shred the side of it. i think its shredding on something else. But ill find out if either one has play when i take the belt off.

 

[Nukeman7]

When (or if) you decide to replace the serpentine tensioner assembly on either Honda J35 engine, be sure to perform the air purge procedure exactly per the factory service manual as shown at the 1 min, 13 sec. mark in the video below. Failure to perform that critical step will cause the large pivot bolt to shear off flush with the engine due to hydraulic shock. It happened to me twice before I determined the cause after extensive research on the issue.

 

[Ang]

When (or if) you decide to replace the serpentine tensioner assembly on either Honda J35 engine, be sure to perform the air purge procedure exactly per the factory service manual as shown at the 1 min, 13 sec. mark in the video below. Failure to perform that critical step will cause the large pivot bolt to shear off flush with the engine due to hydraulic shock. It happened to me twice before I determined the cause after extensive research on the issue.

Yes i will be bleeding it, i just need to find the torque specs for it, J35Y1 may be different As its a very different tensioner design.