Author Topic: Tyres on MOT?  (Read 1854 times)

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Offline bobmax

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Tyres on MOT?
« on: November 06, 2021, 07:33:05 PM »
just got my M3 in for a service & MOT, and they have sent my an advisory Video, which is a NEW ONE ON ME.
iN it the mechanic checks the tyre depths, which are well over 4mm, but there are faint cracks along the inner depth around the tyres (3 actually), which he said will be an advisory.

I'll obviously get them replaced, but don't want to pay Mazda's prices.
So, what do you guys recommend for a half-decent mid-priced tyre?

Also what causes these cracks, bad tyres?
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Offline StevenRB45

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Re: Tyres on MOT?
« Reply #1 on: November 06, 2021, 07:37:01 PM »
Age causes cracks in tyres, simple as that.

The rubber hardens over time and once it gets to a certain point cracks start.

I quite like a Goodyear EfficientGrip grip performance 2...but no idea if it's mid priced in the daft sizes Mazda tends to fit

Offline bobmax

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Re: Tyres on MOT?
« Reply #2 on: November 08, 2021, 01:13:47 PM »
how about Michelin tyres, aren't they softer, would they not crack so easily?
I know they're expensive but thought they might e better lasting.
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Offline yarb

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Re: Tyres on MOT?
« Reply #3 on: November 08, 2021, 01:29:30 PM »
I had the original standard Dunlops 18 inch rims on my 64 plate 3 which were still on it when I traded it in after 6 yrs still had about 2-3 mm tread depth and I had no problems with them with the MOT with cracking
Made it to retirement  :) now can’t go anywhere well I used to be able to 😡

Offline StevenRB45

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Re: Tyres on MOT?
« Reply #4 on: November 08, 2021, 04:05:15 PM »
It's not to do with how expensive the tyres are.

Each tyre compound is made up of different measures of the same things eg. silica and natural rubber and carbon black.

It seems depending on the composition they age differently and more modern high silica (used to get fuel economy and low noise) compounds don't seem to age very well.

My Father in law had Michelin cross climate on his note and they aged like a laptop. At 4 years old they looked like a fender off a fishing boat.

I'd imagine high performance tyres last longer as they have more natural rubber and less silica...but the truth is you can't really tell by just looking at it.

Offline Ed-Led

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Re: Tyres on MOT?
« Reply #5 on: November 08, 2021, 04:14:10 PM »
My front tyres are currently the original Dunlop Sport Maxx fitted to the rear of the car when new, making them nearly 6 years old now. I first had MOT advisories for tyre cracking about 2 years ago but there's still over 5mm tread left on each tyre so i'm going to hold out for now. Recently replaced two of the tyres with Pirelli P7 Cinturato's which are supposed to be more fuel efficient and better in wet conditions than the original Dunlop.   
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Offline bobmax

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Re: Tyres on MOT?
« Reply #6 on: November 09, 2021, 09:15:02 AM »
Thanks for the replies guys.
I guess cracking is a common problem (from my Googling :))
I'll just carry on for a while until I get nervous, ha ha
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Offline StevenRB45

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Re: Tyres on MOT?
« Reply #7 on: November 09, 2021, 07:29:54 PM »
Just keep an eye on them.

Small spidery cracks not really an issue, although wet grip starts to suffer as they harden and rolling noise gets worse.

If the cracks start to join up, bin them unless you fancy risking a delamination.

Offline bobmax

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Re: Tyres on MOT?
« Reply #8 on: November 10, 2021, 08:01:13 AM »
Yes, I will definitely keep an eye on them, cheers. :)
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Re: Tyres on MOT?
« Reply #8 on: November 10, 2021, 08:01:13 AM »