Car tyre question

Silent night

Hi would it affect a car 08 Toyota avensis 2.0 d4d to put 215/50/17 tyres on back and 225/45/17 on front in driving and anything else thanks

biko

Not a DIY question, moved to main motor forum.

What's the reason for your question? Getting cheaper different sized tyres?

https://tiresize.com/comparison/ will show you differences

mikeecho

Usually wider tyres go on the back.

But then that's usually with rwd.

I've a bmw with 245/55r18 on the front and 275/35r18 on the back

HappyAsLarE

The car is not designed for it. Don’t do it.

mikeecho

After a quick search 205/55 r16 seem to a correct size.

colm_mcm

215/45 R17 would be the factory size if fitted with 17s. That said 225/45R17 I s a much cheaper and available size so a lot will have changed to those. These give practically the same rolling radius as 205/55R16 and give a little more sidewall.

To answer the question, either size is fine, I’d be more inclined to put the 215 on the front and 225 on the back.

Silent night

Thanks Colm meant to add earlier got a second set of alloys by chance with 4 new tyres and have 2 new on car already 225/45 /17 want to put winter tyres on 1 set later in year

grogi

Silent night wrote: »

Thanks Colm meant to add earlier got a second set of alloys by chance with 4 new tyres and have 2 new on car already 225/45 /17 want to put winter tyres on 1 set later in year

Don't mix different sizes on car that didn't come with such.

The ESP, ABS and many other three letter abbreviations have some tolerance for different size, for uneven wear.for instance, but doing it on purpose is asking for trouble.

If your size is too expensive, get non-exact match, but for all four.

Indricotherium

biko wrote: »

Not a DIY question, moved to main motor forum.

What's the reason for your question? Getting cheaper different sized tyres?

https://tiresize.com/comparison/ will show you differences

That website is great!!

I surprised that there is only 3mm difference in circumference in the 40r18 I have on the car now and the 50r17 it was built with.

A side question:

If you buy a new car with option wheels that increase the diameter do the dealer do any recalibration on the speedometer and odometer?

colm_mcm

grogi wrote: »

Don't mix different sizes on car that didn't come with such.

The ESP, ABS and many other three letter abbreviations have some tolerance for different size, for uneven wear.for instance, but doing it on purpose is asking for trouble.

If your size is too expensive, get non-exact match, but for all four.

There’s only 2% in the circumference berween them, the ESP won’t realise.
Obviously having all 4 the same is ideal.

OP if you’ve got 4 matching decent new tyres there, then use them.

mickdw

Indricotherium wrote: »

biko wrote: »

Not a DIY question, moved to main motor forum.

What's the reason for your question? Getting cheaper different sized tyres?

https://tiresize.com/comparison/ will show you differences

That website is great!!

I surprised that there is only 3mm difference in circumference in the 40r18 I have on the car now and the 50r17 it was built with.

A side question:

If you buy a new car with option wheels that increase the diameter do the dealer do any recalibration on the speedometer and odometer?

No. Any new car with up grade wheels will have an overall rolling radius similar to the original setup. The alloy will be bigger but the side wall thinner. It might not be exact but it will be within 2 or 3 percent and therefore well within tolerance considering speedo will typically over read by a good few percent for safety.