Tyres - one off compared to others

Bigphil1474

Just wondered if anyone could shed a light on my slightly unusual (for me) tyre wear. Just got my car back from service and MOT and on the health check document they've said the following about the tyres:-

(Inner, Middle, Outer)
N/S Front - I6.0, M6.0, O4.5
O/S Front - I6.0, M6.0, O5.0
O/S Rear - I7.0, M6.0, O5.0
N/S Rear - I6.0, M5.0, O3.5. Advisory

They also pointed it out on the car underside video they do, so doesn't look like a typo. 

The two rear tyres were replaced new together - think about 18 months ago, but could have been a bit longer. One of those did have a puncture repair after it had been on about 2 weeks (near the centre), but done properly. I've only done 6,000 miles since last MOT.

The front 2 were also fairly new at the last MOT/Service . In March 2024 they all had Inner, Mid, and Outer readings of 7.0, apart from the N/S rear which was 6.0 all round. The only other thing that has changed is that I've moved house since. The roads to my newer house all have speed bumps - the type that have a hump in the middle of each carriageway - whereas I could avoid them going to my old house.

Could this be down to speed bump wear or a mechanical issue? I do tend to straddle the bumps when driving. The garage have just advised replacing in the near future.

Arunmor

Don't straddle the bumps, alternate which side of the car goes over them, having said that I always assumed the inner would wear faster (someone can perhaps confirm).

Have you checked the pressures and are they at the correct pressure?

Switch the rear tyres round?

Take the car and get the tracking done, and be careful who you choose, I don't trust many garages to do it properly.  My car ate tyres for awhile and cost me a bit of money until I went to a performance garage who did a grand job.

cw8825

Not an expert but following lot of motorsports. The tyre on the outside of most corners is the one that wears more in races. 

Could be as simple as this 
more turns one way than the other 

knightstyle

Years ago I had a similar wearing pattern, tracking and toe in were checked several times. I found it was caused by having to turn a very sharp corner to enter and leave my parking bay several times a day.

Mildly_Miffed

Get it four-wheel laser aligned. That'll show up if that rear corner's got a bit too much positive camber (top of wheel further out than bottom).
It's less likely to be toe, as that'd be the outside edges of both rears.

What car is it? It may be adjustable, it may not, depending on the rear suspension design.

It's possible that it's just road type, given both NS tyres are slightly more worn on the outside edges.

Bigphil1474

It's a Peugeot 2008 - 18 plate. I've had it 5 years.

Check tyre pressures about once a month and they are rarely change. 

I do now have a driveway to park on, and usually I do a 90 degree turn to the right outside the drive and reverse in, which would put more weight/pressure on the near side tyres. Could it be that? I'm not talking handbrake turn type turning. Obviously can't be the speed bumps now I think about it as they aren't wide enough to affect the outer edge. 

Mildly_Miffed

Bigphil1474 said:

It's a Peugeot 2008 - 18 plate.

That has a rear torque beam - it's a single-piece with both rear wheels, not independent rear suspension, not adjustable in any way.

If the rear alignment is off, then it's bent, and the only solution is replacement.
https://www.ebay.co.uk/itm/297086432489

fatbelly

What make of tyre went on the rear?

Bigphil1474

They are all Bridgestones. 

Bit surprised the garage didn't mention it if the rear beam is bent though. They are usually very thorough, and given all 4 tyres are wearing more on the outer edge as well, suggests it's not that maybe, particularly as the N/S is wearing front and rear?