Which tyre treads do you measure?

[cartyre]

Hi all

Can anyone tell me what tyre treads are suppose to be measured please?
From the photo is it Green, Red Yellow arrows?

My red arrow was 2.7mm and the yellow 3.7mm

Also if the red arrow counts, would you get a new tyre now? As the min is 1.6mm ofcourse.
Thanks all

[foccer]

Yellow

[Mr Tidy]

Like he said Yellow.

But I'd measure the other 3 circumferential grooves too as it isn't unusual to find wear isn't the same across the width of the tread.

[EmailAddress]

[Pica-Pica]

Mr Tidy said:

Like he said Yellow.

But I'd measure the other 3 circumferential grooves too as it isn't unusual to find wear isn't the same across the width of the tread.

Yes, yellow and its fellow primary circumferential grooves. Anything below 3mm gives a higher risk of aquaplaning, so treat this as the minimum if you regularly encounter wet weather.

[Olivergt]

Yellow, and there are normally slightly raised pieces in the groove that indicate the limit, so if the raised part is no longer "in" the groove, the you belie the limit! Hope that makes sense...

There is more information here...

https://simpletire.com/learn/tire-news-information...

[E-bmw]

Olivergt said:

Yellow, and there are normally slightly raised pieces in the groove that indicate the limit,

Correct, the "wear bars" on the OP's picture can be seen about 1" from the bottom of the tyre in the pic.

[Pica-Pica]

E-bmw said:

Olivergt said:

Yellow, and there are normally slightly raised pieces in the groove that indicate the limit,

Correct, the "wear bars" on the OP's picture can be seen about 1" from the bottom of the tyre in the pic.

They should (or at least did) have their location marked on the side wall with TWI (tread wear indicator).mark. This is Goodyear's 'Hermes' Foot' logo, that locates where the TWI bars are. Hard to see, but you can feel it when you run your fingers around the sidewall.

Edited by Pica-Pica on Sunday 15th March 12:58

[cartyre]

Thanks all

So not the green, maybe the Red but definitely the yellow?

The top photo red is 2.7 and yellow is 4.0.

I took it to a tyre place today and he recommended the tyre to be replaced in the top photo based on the Red being 2.7 and the yelow being 4.0

He recommended the rear two being replaced

Which were 3.5 red and 4.0 yellow and 2.7 red and 3.5 yellow
And said they were not smooth ??? Whatever that means?

So he recommended these 2 tyres to be replaced.

What do you all recommended thanks

[cartyre]

Here's photos

[RacingStripes]

Man who sells tyres wants you to buy tyres. Wierd that.

Ignore your red arrows, only check in the 4 grooves the yellow arrow is pointing at.

[EmailAddress]

RacingStripes said:

Ignore your red arrows, only check in the 4 grooves the yellow arrow is pointing at.

Unless you have camber. Or tracking/ alignment issues.

[RacingStripes]

EmailAddress said:

Unless you have camber. Or tracking/ alignment issues.

It doesnt matter if they go bald. Obviously if cords are showing then thats a fail.

[cartyre]

[Ed Boon II]

EmailAddress said:

I thought there had to be visible tread on the outer edges, not bald as that picture shows?

[Funk]

cartyre said:

With respect, the last couple of pictures you've posted aren't relevant at all.

The only tread depths that matter are the ones in the four large grooves in the middle of the tyre in your first pic where you've marked in yellow. Ignore the rest. As long as the tyre isn't really old/perishing/damaged/showing cords you're fine.

P.S. Your tyre place is taking advantage of your naivety and scamming you.

Edited by Funk on Tuesday 17th March 20:29

[EmailAddress]

Ed Boon II said:

I thought there had to be visible tread on the outer edges, not bald as that picture shows?

Taken from the current Gov MOT site.

[EmailAddress]

I'm going to state something for the benefit of this thread.

IF YOU DON'T KNOW HOW TO READ TYRE WEAR, YOU NEED TO PAY MORE ATTENTION TO THE GENERAL CONDITION AND QUALITY OF YOUR TYRES.

Those that understand the regulations, know already about tyre related issues.

Those that are asking 'basic' questions... could do with a little more guidance.

So let's all be kind, remember when we didn't know everything, and help each other.

[Ed Boon II]

EmailAddress said:

Taken from the current Gov MOT site.

Oh, consider myself educated then.

[Pica-Pica]

EmailAddress said:

Ed Boon II said:

Indeed, visible tread on the outer edges, not bald as that picture shows?

Taken from the current Gov MOT site.

Indeed. Visible tread used to be the case, but is no longer so.

"Either side of the central three-quarters of the tyre can be devoid of tread ( bald ).

https://www.gov.uk/guidance/mot-inspection-manual-...

To OP.
With the tread depths you have shown, you DO NOT need new tyres. Check the condition though, and the age (see above govt website for more details).

Edited by Pica-Pica on Tuesday 17th March 22:31