OK to mix 195/60/R15 and 195/65 R 15 91V tires?

[madison41]

I have a 1992 Saab 900 convertible turbo. Is it Ok to have 195/60/R15
tires on the back, and 195/65/R15 tires on the front? I have a chance to
get four new Pirelli tires, but they don't match. I assume it's not a big
deal, that the 60 to 65 won't make a difference in driving or performance.
But thought I'd ask. First-time Saab buyer.

[Grunff]

Yes, as long as you mix as you say front/back. You can't have two
different ones on the same axle. That would drive very odd indeed.

--
Grunff

[Fred W]

...and probably play games with the ABS as well. The 60's and 65's will
have a slightly different circumference.

-Fred W

[Tom@saabtech]

"madison41" <steve....@cognos.com> wrote in message
news:fca4b4d745aa8814...@localhost.talkaboutautos.com...

No, if the car has ABS, as the different rolling diameter will confuse the
hell out of the ABS, regards, Tom.

[chris]

"Tom@saabtech" <saab...@btconnect.com> wrote in message
news:cmo6u1$t4s$1...@hercules.btinternet.com...

I had 185/65 front 195/60 rear on my beater 9000i - the ABS was fine.

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[Zon]

"chris" <ch...@ntlworld.com> wrote in message
news:tJPjd.609$tb6...@newsfe3-gui.ntli.net...

>
> I had 185/65 front 195/60 rear on my beater 9000i - the ABS was fine.
>

That gives you only 6.5 mm difference in diameter. Not a big deal. Uneven
treadwear can cause larger difference in diameter, easily.

However, diameter difference between 195/60-15 and 195/65-15 is 19.5mm,
which may start confusing ABS, especially if 195/65-15 happens to be brand
new and 195/60-15 is already worn out.

BR:Z

[Fred W]

chris wrote:
> "Tom@saabtech" <saab...@btconnect.com> wrote in message
> news:cmo6u1$t4s$1...@hercules.btinternet.com...
>
>>"madison41" <steve....@cognos.com> wrote in message
>>news:fca4b4d745aa8814...@localhost.talkaboutautos.com...
>>
>>>I have a 1992 Saab 900 convertible turbo. Is it Ok to have 195/60/R15
>>>tires on the back, and 195/65/R15 tires on the front? I have a chance to
>>>get four new Pirelli tires, but they don't match. I assume it's not a big
>>>deal, that the 60 to 65 won't make a difference in driving or
>>>performance.
>>>But thought I'd ask. First-time Saab buyer.
>>>
>>
>>No, if the car has ABS, as the different rolling diameter will confuse the
>>hell out of the ABS, regards, Tom.
>>
>
>
> I had 185/65 front 195/60 rear on my beater 9000i - the ABS was fine.
>
>

Not as much difference there.
Let's compare using one tire manufacturer; Michelin Energy MXV4 Plus:

Tire size Diameter

195/65-15 24.9"
195/60-15 24.1"
185/65-15 24.5"

So using the above stats (pulled from the tirerack.com web site) the
difference between 195/60 and 195/65 is 3.3%.

The difference between your 185/65 and 195/60's is half that (1.7%).
The larger the difference is the more likely you are to get into trouble
with the ABS computer.

-Fred W

[MH]

> > No, if the car has ABS, as the different rolling diameter
> > will confuse the hell out of the ABS,

If that is the case you would be in trouble when going through a tight curve
wher the outside wheel turns faster than the inside wheel, the ABS should
not care.

> I had 185/65 front 195/60 rear on my beater 9000i - the ABS was fine.

I can imagine that would be OK; the ABS would only 'look at' individual
wheels to see if that wheel is locked when it should not be, not at the
possibly different speeds or speed ratios of all the wheels.

--
MH
'72 97 '77 96 '78 95 '79 96
'87 900T8
http://go.to/saab96

[ma_twain]

chris wrote:

You can run with the different size tires. Different footprints will
result in slightly different handling. As long as you do not push to the
limits of handling, you should be fine. But it is a turbo convertible -
so how hard do you drive it? It would have more body flex than the
hardtop. This was very noticeable the first time I drove a Saab
convertible after driving the 3 door hatchback body style for years.

[bob]

No problem, but I'd put the 65s on the rear because- in a panic stop, you don't want your rear end to slide out. The front end will do fine with the ever so slightly smaller 60s because 1) you have steering control, and 2) ABS brakes. If you don't rotate, the front will need to be replaced while there's still decent tread on rear. At that time, you'll buy new 65s for the rear, and rotate old 65s to front. It's all about maintain best possible control when traction gets iffy.

--
For full context, visit https://www.motorsforum.com/saab/ok-to-mix-195-60-r15-and-195-65-r-15-91v-tires-29354-.htm

[Michael Kastner]

You can definitely put different tires on the front and back of your car. In fact, it's often recommended to do so. Having different tires on the front and back helps improve traction and grip, which can be especially helpful in colder weather or when driving on wet or icy roads.
However, you should make sure that the tires you choose are of the same brand and model. Mixing and matching tires from different brands can cause problems, as they may not work together as well and could potentially lead to accidents.
If you're looking for tires that will improve your car's performance, Pirelli tires are a great option. They offer excellent grip and traction, and are known for their durability. So if you can get four new Pirelli tires, it would definitely be worth it.