2017~2021 Do I need to replace the 4 tyres?

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2017 Mazda 6 Sport
The recomended limit for all tires on an AWD veicle is 1/4 in difference in circumference according to Subaru, Audi and others. That is ~ 2/32 inch difference in tread dept for our tire size. Ed
I'm pretty sure Subaru says 1/8" difference in tread depth difference, which would be 1/4" in circumference.
 
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2016.5 CX-5 GT AWD titanium/black 2016 Miata Club ST MT white
Of course, a good legal advice is to replace all four... :)

If it happened to me, I would replace just one and keep the pressure lower than the other three.
(such that the heights from bottom edge of rims to the ground are the same)

This new one will wear faster (due to lower pressure).
As it wears, you can increase pressure to keep the same height, per se.

Eventually, they will wear out together. Then, get all four replaced.

I don't agree with the above advice. A tire with lower pressure than the three will generate more heat than the others and will expand at a different rate accordingly. Of course the amount of expansion will depend on how much lower the pressure is set at as compared to the other three.

If it was me I'd be pretty tempted to replace two tires and keep them on the same axle, either front or rear. You'd have to make sure that they stayed that way when rotating them as well.

I'd keep the good tire that you replaced, just in case this happens again.
 
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2017 Mazda CX-5 GT, 2016 Mazda6 iGT, 2014 Mazda3 sGT hatchback
My advice was to replace all four. (your money)

If it happened to me, I would not do that. (my money :))
I would definitely buy the same brand/spec tire and keep PSI slightly lower.
(not to trigger TPMS).
Friction might differ, but we are not comparing new vs. bold tires here.
Just saying what I would do.
Not a sound advice to others.
 
Hello all,

Thanks all for your replies.

Honestly I haven't decided yet what to do.

The new tyre has obviously a tread depth of 10/32" (0.31'") and the old ones 4/32".

Shaving is not an option here as nobody does it.

I am still 🤔.

Thanks and regards
 
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Virginia
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2021 CX-5 White
Hello all,

Thanks all for your replies.

Honestly I haven't decided yet what to do.

The new tyre has obviously a tread depth of 10/32" (0.31'") and the old ones 4/32".

Shaving is not an option here as nobody does it.

I am still 🤔.

Thanks and regards
4/32 is just about done. Here annual safety inspection says 4/32 is time to replace. Get 4 new tires! You will not be sorry
 

PaulZooms

16.5 GT Sensing
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Lakewood, CO
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2016.5 CX-5 GT
4/32nds is the legal minimum tread depth for Winter mountain driving in Colorado. Not sure what your driving weather is.

Tires are not something to be cheap about. Much cheaper for a new set than the cost of a repair/deductible if you were to have a crash. Besides, the OEM Toyo’s are nothing to write home about. Pick out a nice, new set of tires that improves handling and traction. You’ll be glad you did.
 
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North of Toronto
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2019 CX-9 Sig
I'd do 4.

As an option, I wonder if 2 new on back makes some sense.. maybe less confusing to the awd. Would trigger AWD sooner? I'm speculating with this.

But. Perhaps most importantly, in emerg situation, back with more grip prevents spinning the tail out.

If the front 2 have more grip, you could slam brakes, the front would grip, but if tail starts to come out it could really come out. You'd spin like a top (in theory).

Sort of the same reasoning with winter rubber and FWD. On FWD cars, if mounting 2 winter tires, the recommendation is the two winter tires go on the rear (non drive wheels). Just for that reason, you don't want to invite spins. Wouldn't help you go in FWD, but dying from lack of "go" is less likely than dying from a spin out
 
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Virginia
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2021 CX-5 White
I am sorry, but you really need to bite the bullet and get 4 new tires, especially if you live north of Toronto, as in your tag line. I know new P255/50R20 tires will be painful, and if you don't want to get winter tires, not sure what the provincial rules are, I would think a 3PMSF rated tire might suffice such as the Vredestein Quatrac Pro, for a nice balance of price and performance.

To sort of paraohrase another company, your tires really are the only thing between you and the road.
 
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2013 Mazda CX-5 Sport FWD Auto
I’m with the others, 4/32 depth is nearly done for. Another vote for replacing all 4 tires.
 
Dear all,

Thanks to all for your advice.

Even though I made a mistake and my old tyres tread depth is 5/32 and not 4/32 as I have told you I will bite the bullet and take last comments advice, you cannot be cheap on safety.

By the way, the legal limit in Spain for tread depth is 1/16" (normal weather conditions).

Thanks again to all :)
 
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North of Toronto
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2019 CX-9 Sig
I am sorry, but you really need to bite the bullet and get 4 new tires, especially if you live north of Toronto, as in your tag line.

Sorry to confuse, I was just giving thoughts for OP in my post.

Wife is from Quebec, so even if I didn't believe in winter tires, I'd still have them. But I do believe.

Have X-ice on CRV (that car is sitting now so I'm not going to swap this yr) and wanted X-ice for CX9 but at time couldn't find size (late 2019). I run DMV2s as a result, happy with them.
 
No...but did not like the stock tires. With only 5k on my 2019 Touring, replaced them with M. CrossClimate 2's . Note: my buddy owns a tire shop, so yes I got a good deal.
 
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Virginia
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2021 CX-5 White
No...but did not like the stock tires. With only 5k on my 2019 Touring, replaced them with M. CrossClimate 2's . Note: my buddy owns a tire shop, so yes I got a good deal.
Taking us a little off, but how do you like the Cross Climate 2's? I have heard good things about them in all sorts of weather, true all seasons, not 3 seasons. They certainly have a distinctive look about them, and the 600 UTQG is pretty amazing in a tire that purportedly performs well enough in the snow to get a 3PMSF symbol and pretty good warm weather performance.

I helped my son get a set for his car, but he just says, they are great with little else.
 
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Fredericton Canada
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2018 CX-5 GT
Taking us a little off, but how do you like the Cross Climate 2's? I have heard good things about them in all sorts of weather, true all seasons, not 3 seasons. They certainly have a distinctive look about them, and the 600 UTQG is pretty amazing in a tire that purportedly performs well enough in the snow to get a 3PMSF symbol and pretty good warm weather performance.

I helped my son get a set for his car, but he just says, they are great with little else.
I have been doing some research on the Michelin CC 2's but from what I hear and have read they have a harsh ride and aren't very quiet. For that reason I'm now leaning towards the Continental Cross Contact LX25's.