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#4691870 - 03/11/18 08:03 PM low-profile tires w/ sidewall cracks
Number_35 Offline


Registered: 07/07/14
Posts: 818
Loc: Winnipeg MB CA
A couple of years ago we lent the Mazda 5 to Jr & his wife for a long trip. I thought that the rear tires were getting a bit worn, and decided to replace them before they left. I was shocked to see cracking on the inner-facing sidewalls (but was really glad I'd decided to replace them). The outer-facing sidewalls looked fine. These are by far the lowest-profile tires I've ever had. When I was young, 78-series tires were standard, and 70s were hot stuff.

With these 50s, it's very hard to tell visually when they're low. I suspect we unknowingly ran them with too little pressure.






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#4691872 - 03/11/18 08:06 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2602
Loc: Cedarbrae, Ontario
Wow, good thing you replaced them!
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#4691873 - 03/11/18 08:09 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
what was a month/year year of the production; maybe that has something to do with cracks
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2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4691877 - 03/11/18 08:11 PM Re: low-profile tires w/ sidewall cracks [Re: miden851]
Number_35 Offline


Registered: 07/07/14
Posts: 818
Loc: Winnipeg MB CA
The car was about 6-1/2 years old at that point, with about 90K km. I wonder if the Hankooks were the original tires?

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#4691879 - 03/11/18 08:16 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
there is a saying, no more than 5 year old tires on the car; anything beyond you run into risk of compromised performances
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2008 Mazda6i GT; @195K miles
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#4691881 - 03/11/18 08:17 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
Ducked Offline


Registered: 10/25/12
Posts: 4336
Loc: Taiwan
I usually look at these threads expecting to think "Pah! cosmetic. Years left on them" and I usually do.

But maybe not this time.

Can you see the belting? IIRC that's the "official" UK MOT test fail criterion, though in practice the testers seem to do whatever they like.

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#4691898 - 03/11/18 08:36 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
JC1 Offline


Registered: 11/29/08
Posts: 3002
Loc: Oshawa, Ontario Canada
That's one of the worst tires I've ever seen. Scary.
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#4691912 - 03/11/18 08:54 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2333
Loc: Canada
Exactly why I replace OEM tires ASAP on all cars I purchase used (all of them).
Unless the PO can prove they were just changed AND they are of reputable quality.
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#4691924 - 03/11/18 09:11 PM Re: low-profile tires w/ sidewall cracks [Re: Lolvoguy]
Number_35 Offline


Registered: 07/07/14
Posts: 818
Loc: Winnipeg MB CA
Originally Posted By: Lolvoguy
Exactly why I replace OEM tires ASAP on all cars I purchase used (all of them).
Unless the PO can prove they were just changed AND they are of reputable quality.
These are the upscale factory 17" alloys. November through March I run 55-series winters on 16" steel rims, and far prefer them. Am considering buying used 16" Mazda alloys along with four new 3-season tires. The 50-series tires really transfer a lot of shock to the suspension, as well as providing a harsh ride.

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#4691930 - 03/11/18 09:23 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Itís hard to tell for sure but I think it reads 07/08; so that tire is most likely from Feb 2008

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2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4691933 - 03/11/18 09:24 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
PimTac Offline


Registered: 03/04/17
Posts: 4258
Loc: Soviet State of Washington
Very fortunate you caught those. They look like they would have separated on that long trip, especially if in a hot climate.
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#4691941 - 03/11/18 09:32 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
JHZR2 Offline



Registered: 12/14/02
Posts: 41773
Loc: New Jersey
Yikes.

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#4691942 - 03/11/18 09:33 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
rooflessVW Offline


Registered: 12/24/11
Posts: 4039
Loc: North Carolina
Toast from heat
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"Zed's dead baby, Zed's dead."

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#4691951 - 03/11/18 09:40 PM Re: low-profile tires w/ sidewall cracks [Re: Number_35]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2333
Loc: Canada
Not just heat, but heat and cold cycling with a very dry climate, year round.
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#4691979 - 03/11/18 10:25 PM Re: low-profile tires w/ sidewall cracks [Re: Lolvoguy]
rooflessVW Offline


Registered: 12/24/11
Posts: 4039
Loc: North Carolina
Originally Posted By: Lolvoguy
Not just heat, but heat and cold cycling with a very dry climate, year round.

I meant heat from chronic under-inflation.
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