Tyre Sizes on Alloys

panthro · 4 Sep 2006 at 21:14

Hi There

I need 2 new front tyres to replace my standard 172 alloys 195/45/16 V. However, I am planning on buying some turini wheels (ala 172 cup), but the written size for them is 205/45/16.
Is it possible for me to put 205/45/16 on my standard 172 wheels, and then swap them over once I buy my turinis? Cheers.

Firestar_3x · 4 Sep 2006 at 21:19

about and inch bigger the new tyres so your speedo would be about 0.9 mph out, provided your rims can take that width tyre?

panthro · 4 Sep 2006 at 21:25

Firestar_3x said:
about and inch bigger the new tyres so your speedo would be about 0.9 mph out, provided your rims can take that width tyre?

Im not sure if they can. I guess 1mph out isnt so bad. It will make me subconciously more aware of my speed!

Clarkey · 4 Sep 2006 at 21:31

they will fit just fine, 10mm over is nothing.

[TW]Fox · 4 Sep 2006 at 21:32

Clarkey said:
they will fit just fine, 10mm over is nothing

Errr I certainly would NOT advise mixing tyre sizes on the same car!!!! :eek:

penski · 4 Sep 2006 at 21:34

[TW]Fox said:
Errr I certainly would NOT advise mixing tyre sizes on the same car!!!!

What are you jabbering about? There's nothing wrong with having wider rubber at one end than the other.

How wide are your rims and the cup rims?

*n

Firestar_3x · 4 Sep 2006 at 21:35

Long as you don't mix diff on the same axle its all good

Clarkey · 4 Sep 2006 at 21:39

[TW]Fox said:
Errr I certainly would NOT advise mixing tyre sizes on the same car!!!!

and to think you're the one always telling me i'm the one spouting BS

Pretty sure that beemer you are hankering over has much wider tyres in the rear eh...

panthro · 4 Sep 2006 at 21:46

penski said:
What are you jabbering about? There's nothing wrong with having wider rubber at one end than the other.

How wide are your rims and the cup rims?

*n

cant find the wheel dimensions for my standards but the cups are 16"x7".

Firestar_3x · 4 Sep 2006 at 21:46

Most 16" are 7" wide arn't they?

penski · 4 Sep 2006 at 21:47

panthro said:
cant find the wheel dimensions for my standards but the cups are 16"x7".

7" wide, eh?

Prime for 175/60/16s then

*n

[TW]Fox · 4 Sep 2006 at 21:47

penski said:
What are you jabbering about? There's nothing wrong with having wider rubber at one end than the other.

Of course not, which is why the profile of the tyre differs to compensate for this.

In this case, the profile remains at 45 despite the increase in width..

Clarkey said:
Pretty sure that beemer you are hankering over has much wider tyres in the rear eh...

Correct - but it has 35 profile rear tyres and 45 profile front tyres as a result of this.

penski · 4 Sep 2006 at 21:49

[TW]Fox said:
Of course not, which is why the profile of the tyre differs to compensate for this.

In this case, the profile remains at 45 despite the increase in width..

Correct - but it has 35 profile rear tyres and 45 profile front tyres as a result of this.

There's nothing wrong with running 195/45/15 fronts and 205/45/16 rears either.

*n

[TW]Fox · 4 Sep 2006 at 21:50

penski said:
There's nothing wrong with running 195/45/15 fronts and 205/45/16 rears either.

*n

But the front tyre will be smaller than the rear tyres surely? The sidewall height will differ..

Firestar_3x · 4 Sep 2006 at 21:52

in this case the circumference will be 1" diff, or .9mph on the speedo.

panthro · 4 Sep 2006 at 21:52

penski said:
There's nothing wrong with running 195/45/15 fronts and 205/45/16 rears either.

*n

what about vice versa - 205 front 195 rear? as I am only changing the front 2.

penski · 4 Sep 2006 at 22:00

[TW]Fox said:
But the front tyre will be smaller than the rear tyres surely? The sidewall height will differ..

And?

This is only an issue if you run a 4WD car with a solid centre diff.

In a FWD car, the rear wheels are free-rolling so it doesn't matter if they are of a different diameter than the fronts.

In a RWD car, the front wheels are free-rolling so it doesn't matter blahblahblah.

*n

penski · 4 Sep 2006 at 22:01

panthro said:
what about vice versa - 205 front 195 rear? as I am only changing the front 2.

Nowt wrong with that. It is a FWD car after all...

*n

[TW]Fox · 4 Sep 2006 at 22:03

penski said:
And?

Surely it will look daft with one tyre bigger than the other, and depending on the size difference, give your car an appearance similar to that of a Xantia with broken rear height corrector stuck in high position

Lopéz · 4 Sep 2006 at 22:06

penski said:
And?

This is only an issue if you run a 4WD car with a solid centre diff.

In a FWD car, the rear wheels are free-rolling so it doesn't matter if they are of a different diameter than the fronts.

In a RWD car, the front wheels are free-rolling so it doesn't matter blahblahblah.

*n

Correct. I used to run stupid offset wheels on the front of my er, Rover 213

The front and back were totally different profiles etc.

Best £150 I ever spent, almost.