Tyre swap front to rear?

[Ala Larj]

On my GS300h the tread depths are as follows:

Both fronts are 4.2mm

Passenger rear 6.8mm

Driver rear 3.2

I am going to buy a new one for the driver rear. Would you just change that one or put the fronts on the back and the passenger rear and new one on the front?

 Thanks for any advice. 

[NemesisUK]

It's recommended to put new(er) tyres with greater tread depth on the rear. Most tyre shops would insist on this as a safety thing

[Ala Larj]

Thanks. That’s useful to know. 

[royoftherovers]

11 minutes ago, Ala Larj said:

Thanks. That’s useful to know. 

If you had bought both rears at same time, then you have a problem Al. (suspension, driving technique, sub standard tyre ?)

Otherwise, as Peter has said.

[Las Palmas]

1 hour ago, NemesisUK said:

It's recommended to put new(er) tyres with greater tread depth on the rear. Most tyre shops would insist on this as a safety thing

Front wheel drive cars.

[Ala Larj]

23 minutes ago, royoftherovers said:

If you had bought both rears at same time, then you have a problem Al. (suspension, driving technique, sub standard tyre ?)

Otherwise, as Peter has said.

The good one on the back was bought due to a puncture a couple of years back. 

[Ala Larj]

5 minutes ago, Las Palmas said:

Front wheel drive cars.

But what about rear wheel drive?

[NemesisUK]

1 minute ago, Las Palmas said:

Front wheel drive cars.

All cars. It's far safer to have understeer than oversteer.

https://kumhotyre.co.uk/kumho-news/should-you-fit-new-tyres-to-the-front-or-rear/

https://www.oponeo.co.uk/blog/better-tyres-in-the-front-or-back-test-results

 

[Ala Larj]

Just now, NemesisUK said:

All cars. It's far safer to have understeer than oversteer.

https://kumhotyre.co.uk/kumho-news/should-you-fit-new-tyres-to-the-front-or-rear/

https://www.oponeo.co.uk/blog/better-tyres-in-the-front-or-back-test-results

 

Ah, that’s really useful. Thanks 

[Las Palmas]

6 minutes ago, NemesisUK said:

All cars. It's far safer to have understeer than oversteer.

https://kumhotyre.co.uk/kumho-news/should-you-fit-new-tyres-to-the-front-or-rear/

https://www.oponeo.co.uk/blog/better-tyres-in-the-front-or-back-test-results

 

Had a kit-car with 185 front and 235 rear. Rear wheels were spinning a lot; more power than weight. 2L Porsche engine 650Kg car.

Depending on driver a rear wheel car with much wider rear tyres should have good tread depth on all wheels but if slightly less on front wheel steering can be adjusted with engine power.

[peniole]

Why does it seem that everyone and dealers have abandoned tire rotation as standard maintenance practice?

[Malc]

4 minutes ago, peniole said:

have abandoned tire rotation

believe it or not, and I found it hard too initially 

Not all cars have the same size tyres supplied from new front and rear ......... weird I know but there you are

Malc

[Ala Larj]

1 minute ago, Malc said:

believe it or not, and I found it hard too initially 

Not all cars have the same size tyres supplied from new front and rear ......... weird I know but there you are

Malc

Indeed. My old IS had wider ones on the rear. 

[Las Palmas]

Many powerful cars with rear wheel drive were like that.

Do not know much about new cars as I have time enough to drive a slow front wheel drive car now.

[Pielight]

My gsf has larger tyres at the back.

As mentioned above, tyre manufacturers recommend newest tyres on the rear regardless of front or rear wheel drive.

[peniole]

2 hours ago, Malc said:

believe it or not, and I found it hard too initially 

Not all cars have the same size tyres supplied from new front and rear ......... weird I know but there you are

Malc

I know that the minority have staggered wheels [technical term 😀), nice thick layer of sarcasm btw, the question still stands for the majority of cars that aren't ISFs GSFs or indeed corvettes.

[NemesisUK]

No question. New tyres to the rear. No reputable tyre shop would fit otherwise..

[scudney]

Just a thought/question why would anyone fit the newest tyres on a front wheel drive car on the rear,doesn't really make sense or am I missing something 🤔

[peniole]

Think of going around a sweeping bend at motorway speeds, now add water, enough to cause hydroplaning if you don't have enough siping left on the old set. Now which tyres would you prefer hydroplane? Rear = rear end swinging out (oversteer) possibly now 90 degrees to traffic or even facing the complete wrong way, or Front = plow straight on (understeer) into the verge?

Both situations suck, one moreso than the other, which is why rotation when possible and replace a whole 4 set is the ideal solution.

[Thackeray]

 

Here's a video showing the effect of aquaplaning with new tyres first on the rear and then on the front.

 

[Initial P]

My car has 265 35Z R19 98Y for the rear and 235 40Z R19 96Y for the front as per OEM.

I had a new set of Continental Sport Contact 7 fitted yesterday previously I had Falken.