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