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Author Topic: Mix and Match Tires  (Read 4931 times)

Offline tortoise

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Mix and Match Tires
« on: May 08, 2023, 09:09:06 am »
This isn't something I'd normally do, but yesterday my wife smoked a pothole and now there's a massive bulge in the front left tire. The fronts are older, 2015, so not the end of the world since they were due for replacement.

The rears are from 2018, with lots of tread left. Both are Pirelli P7 A/S+.

I can't find those models any more, but I can get two P7 A/S 3's in the same size/load index/speed rating as the rears.

Anyone see an issue with this?  Or should I just bite the bullet and replace all 4?

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Offline blur911

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Re: Mix and Match Tires
« Reply #1 on: May 08, 2023, 09:21:18 am »
Quote from: tortoise on May 08, 2023, 09:09:06 am
This isn't something I'd normally do, but yesterday my wife smoked a pothole and now there's a massive bulge in the front left tire. The fronts are older, 2015, so not the end of the world since they were due for replacement.

The rears are from 2018, with lots of tread left. Both are Pirelli P7 A/S+.

I can't find those models any more, but I can get two P7 A/S 3's in the same size/load index/speed rating as the rears.

Anyone see an issue with this?  Or should I just bite the bullet and replace all 4?

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I've mixed and matched before with no ill effects.   I'd do it.
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Offline OliverD

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Re: Mix and Match Tires
« Reply #2 on: May 08, 2023, 09:51:28 am »
Yeah, it sounds like those tires are similar enough for it not to matter.
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Offline ktm525

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Re: Mix and Match Tires
« Reply #3 on: May 08, 2023, 10:12:56 am »
What car?

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Offline PJungnitsch

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Re: Mix and Match Tires
« Reply #4 on: May 08, 2023, 10:15:30 am »
Mixed and matched here too with no problems on RWD and FWD vehicles

Think the one that is a problem is Subaru with full time AWD
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Offline tortoise

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Re: Mix and Match Tires
« Reply #5 on: May 08, 2023, 10:56:06 am »
Quote from: ktm525 on May 08, 2023, 10:12:56 am
What car?
205 Golf Wagon TDI

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Offline Gurgie

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Re: Mix and Match Tires
« Reply #6 on: May 08, 2023, 11:16:29 am »
You're fine to mix & match like that, done it many times.

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Offline capriracer

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Re: Mix and Match Tires
« Reply #7 on: May 09, 2023, 07:11:11 am »
As was pointed out above, one of the issues with mixed tires is AWD systems.  Some are very sensitive to tire diameter.

The other issue is emergency situations.  Vehicles tend to pivot around odd tires in emergency maneuvers - and the more odd the tire, the more severe this pivoting will be. 
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Offline blur911

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Re: Mix and Match Tires
« Reply #8 on: May 09, 2023, 09:08:07 am »
Quote from: capriracer on May 09, 2023, 07:11:11 am

The other issue is emergency situations.  Vehicles tend to pivot around odd tires in emergency maneuvers - and the more odd the tire, the more severe this pivoting will be.

For the ultimate in mismatched tires and results, skid plate racing: https://youtu.be/2mk4IWmciuE?t=80
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Offline Firm

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Re: Mix and Match Tires
« Reply #9 on: May 09, 2023, 10:00:45 am »
I've bought plenty of cars with mis-matched tires, never had a problem, but the difference in appearance drives me nuts so I've always replaced them with a matched set. From a practical standpoint though, you should be fine. As others have called out, might be a different story if you had an AWD system to worry about.
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Offline Arthur Dent

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Re: Mix and Match Tires
« Reply #10 on: May 09, 2023, 12:52:50 pm »
You might get lucky and find a matching mismatch on Kijiji or FB.
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Offline Slow_lane

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Re: Mix and Match Tires
« Reply #11 on: May 09, 2023, 05:51:56 pm »
Quote from: Arthur Dent on May 09, 2023, 12:52:50 pm
You might get lucky and find a matching mismatch on Kijiji or FB.

I agree. You might find a deal on 4 matching tires and that way your ready for 2 more blowouts!!!  ;D

I have purchased a set of 4 in the past under similar circumstances. This is when it pays to have relatively popular tires on your car. Makes it easier to find a 2nd hand set.
« Last Edit: May 10, 2023, 08:53:48 am by Slow_lane »
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Offline tortoise

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Re: Mix and Match Tires
« Reply #12 on: May 09, 2023, 08:27:41 pm »
There were a couple of used options but they would have had me buying new tires in a year or two.
« Last Edit: May 09, 2023, 08:29:13 pm by tortoise »
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Offline ArticSteve

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Re: Mix and Match Tires
« Reply #13 on: May 09, 2023, 09:46:22 pm »
It's just another piece of rubber on an older vehicle.  You must have better things to spend resources on?
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Offline Jaeger

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Re: Mix and Match Tires
« Reply #14 on: May 10, 2023, 09:11:55 am »
The mismatch would drive me nuts and compel me to replace all 4, but it's not like the car will me meaninfully compromised in any functional sense.
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Offline tortoise

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Re: Mix and Match Tires
« Reply #15 on: May 10, 2023, 10:29:31 am »
Quote from: ArticSteve on May 09, 2023, 09:46:22 pm
It's just another piece of rubber on an older vehicle.  You must have better things to spend resources on?
Like two kids that are bleeding me dry?

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Offline tortoise

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Re: Mix and Match Tires
« Reply #16 on: May 10, 2023, 10:30:11 am »
Quote from: Jaeger on May 10, 2023, 09:11:55 am
The mismatch would drive me nuts and compel me to replace all 4, but it's not like the car will me meaninfully compromised in any functional sense.
Yeah, since they are both Pirelli P7's I don't think it will bother me.

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Offline blur911

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Re: Mix and Match Tires
« Reply #17 on: May 10, 2023, 10:45:50 am »
Quote from: ArticSteve on May 09, 2023, 09:46:22 pm
It's just another piece of rubber on an older vehicle.  You must have better things to spend resources on?

I just bought two used tires for my Cayenne, the rears were worn quite a bit more than the fronts (probably that control arm issue last year) and I didn't want to buy a whole new set.  Yesterday I saw on marketplace that someone nearby was selling two of the exact tire, so I bought them.  Only difference I found is they are build in Germany, mine were built in USA.  Eagle LS2
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Offline Slow_lane

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Re: Mix and Match Tires
« Reply #18 on: May 10, 2023, 03:14:16 pm »
59 matches for Pirelli P7's on Kigigi Montreal
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Offline tortoise

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Re: Mix and Match Tires
« Reply #19 on: May 10, 2023, 07:54:14 pm »
225/4517's?

Not worth driving from Ottawa to Montreal for new tires!

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