Uneven Tyre wear - winter tyres

[RabidGranny]

Morning all. I have a 2023 Toyota rav 4 phev and have just swapped the winter wheels for the summers. I got the bill and with it the mechanic also sends the actual thread depth left on the wheels being taken off. It looks like all the tyres are fine thread wise except one which is down to the minimum. I was wondering what could be the cause of this? I know its a heavy car etc but the tyres are relatively new as the car is only a year old and these tyres have only been on the car from October until last week. My question is what conceivably be the cause of such wear on one corner only. The tyres are Bridgestone blizzak 17".

THanks in advance.

[E-bmw]

Tyres wear when they are slipping.

Wet roads cause tyres to slip.

Winter tyres are softer than summers.

It will likely be the front left outside edge, which wears the most on roundabouts on a heavy car.

[Pica-Pica]

If the mechanic is measuring a tread (not ‘thread’) depth, they should measure in three places across the centre 3/4 of the width, otherwise the information is incomplete. What were the actual measurements. Just saying 3 are fine and 1 is worn down is not much information. Quickly frankly, if the car drives OK and steers OK, then, unless there is a major difference in current tread depth, I would not worry. I would see how the summers go in comparison. That would give a better assessment.

Winters are mostly recommended for changing at 4mm tread left (to provide adequate snow grip), and summers at 3mm (to reduce the risk of aquaplaning). The other question perhaps is, would all-seasons be a better choice? What the roads like, what is the winter weather like, and do you go off-road, or on tracks?

[RabidGranny]

Pica-Pica said:

If the mechanic is measuring a tread (not ‘thread’) depth, they should measure in three places across the centre 3/4 of the width, otherwise the information is incomplete. What were the actual measurements. Just saying 3 are fine and 1 is worn down is not much information. Quickly frankly, if the car drives OK and steers OK, then, unless there is a major difference in current tread depth, I would not worry. I would see how the summers go in comparison. That would give a better assessment.

Winters are mostly recommended for changing at 4mm tread left (to provide adequate snow grip), and summers at 3mm (to reduce the risk of aquaplaning). The other question perhaps is, would all-seasons be a better choice? What the roads like, what is the winter weather like, and do you go off-road, or on tracks?

I live in switzerland so the roads are very decent but we obviously have very heavy snow at times in winter/spring. The 'summers' are in fact four seasons. He told me when i bought the car i can go anywhere but not into snow with them. So the winters go on in October to go up the mountains. my wife thinks that the fact we park the car on a slant under our balcony outside the garage door means the weight on the front RHD tyre and that it is probably the one wearing down because of this. Im not so sure because we had a subaru legacy and it never wore down on its winters to that effect. in fact for that car we changed those tyres due to their age.

Anyway thank you for responding

[E-bmw]

RabidGranny said:

my wife thinks that the fact we park the car on a slant under our balcony outside the garage door means the weight on the front RHD tyre and that it is probably the one wearing down because of this.

Tyres don't wear when stationary.