Insane tire wear at 30k miles. ‘23 Prime SE

didn't anyone notice at the previous services?

 

They should've caught that on your last tire rotation @ 25K. Looks like it was toe-out really badly. Did you wack a curb really hard or gone over some major pot holes?
I would stop using that dealership; since that's on the basic safety check list. Any blind mechanic should've found that. Makes me wonder what else they're checking off and not doing???? Did the dealership tell you that you needed an alignment and tires????

 

I'd take those pictures, alignment paperwork and speak to the dealerships service manager. Their going to say that you whacked a curb, but since all 4 had inside wear - they've been rotating them and not noticing the issue.
Why do 6 month / 5K checks if they don't recognize obvious issues?????

Who knows; they might give you a few FREE oil changes - but I would be afraid they'd screw that up too.....

You can tell that I do my own basic maintenance, so I don't get surprises like that. I also do fluid checks and basic walk around before a long trip.

Hope this helps....

 

That's the thing. Best to just stay away as much as practical, DIY.

 

That wear didn't happen overnight. Does no one do a basic walk-around, check their fluids, or stick their tires anymore?

 

Couldn't help to notice that you had a mix of tires replaced ... Bridgestone and Toyo A/S Extensa II. Which brand did it originally come with?

 

Inside wear is tough to find; unless you get on your hands and knees or do your own rotations. Those pictures tells a story of long term neglect and obvious alignment issues. I don't see how that was missed on the dealerships basic safety inspections. There should be notifications in the dealerships paperwork to cover their asset from liability law suits.

 

You were down below the cords on that Bridgestone. That isn't just 10K miles of wear; that's a combination of under-inflation and misalignment over a lot of miles - more than 10K.

 

2023 Prius Prime SE on Bridgestone Ecopa tires with 22,540 miles on them. Recently have experienced some rough tread wear as well.

Miles 13,156 to 17,022, tires went from 6/32 to 5/32 tread depth. Nothing crazy, but from 17,022 to 22,333, tread depth plummeted from 5/32 to 1/32 (according to Toyota). Went to a local tire shop and they said 2/32 - 3/32. All tires have inner sidewall wear, smooth with some bumps where the tread used to be. Ordered tires since 195/60R17's aren't readily available, then will do a full alignment.

With so much wear in 5K miles, what do you guys think the main culprit is? Toe? Camber?

 

Your tire pressure was simply way too low. After all, garages like to sell tires.

Personally, I have always set my tire pressure to the maximum recommendation for 35 years.
For the factory-fitted Yokohama BluEarth-GT AE51 195/50 R19 88H RPB, Toyota advice, 2.6 bar at the front and 2.4 bar at the rear, for the Prius Phev exclusive 2024. (Highway)

Do measure this in the morning and not in the sun. They wear perfectly evenly after 26,000 km. 2.7 bar at the front and 2.5 bar at the rear won't do any harm either.

If you drive on the highway on a hot day, the pressure temporarily rises quickly to 3.1 bar and 2.8.

 

Improper inflation and misalignment (toe). Any shop will provide a before and after alignment reading; unless they are working with really old equipment.
I keep all my tires at 38 psi, so I don't have to check them when I rotate them. Even wear all the way across. I only got around 30K on the OEM's and replaced them with 65K mile tires.

 

There should be after market parts that will allow for that adjustment. A good collision repair shop would have a line on something like that; because they sometimes can't get everything to line-up properly after an accident.
Don't wait too long to fix that; because your just tearing up your new tires. NO warranty on the tires, because you have a known suspension issue.
That should've been fixed under warranty. I had a similar issue with a Honda. It was a silent notification with a TSB, so I got reimbursed for the special alignment with parts, but not the 4 tires they chewed up.

Hope this helps.....

 

so we have a preowned prius with mix and match tires at 6,000 miles? one has to ask oneself why

 

maybe they hit a curb and knocked things out of alignment

 

I also run my tires at 38psi, I appreciate the added firmness feel and perceived responsiveness as opposed to the Toyota recommended 34/35psi. Will do an alignment soon after I replace these original tires.