Measuring tread depths

Gaz VTS Council member Posts: 2,157 Class tested: 4, 7 Last Online: Sept 7, 2019 10:16:48 GMT 1 Likes: 738	Measuring tread depths Mar 4, 2014 23:52:28 GMT 1 via mobile Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by Gaz on Mar 4, 2014 23:52:28 GMT 1 This divided the testers in our garage today. The central two bands had no tread wear indicators and measured 1mm. The rest of the centra 3/4's measured 4mm. Pass or fail?
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baz657 Administrator Keeping safe Posts: 4,703 Class tested: 1, 2, 3, 4, 5L, 7 Last Online: Apr 25, 2024 14:12:25 GMT 1 Likes: 1,612	Measuring tread depths Mar 5, 2014 0:40:15 GMT 1 Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by baz657 on Mar 5, 2014 0:40:15 GMT 1 No tread wear indicators = no measuring = pass. Seen quite a few directional tyres that are the same.
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nitros44
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Post by nitros44 on Mar 5, 2014 0:43:04 GMT 1

Although the two central bands do not contain tread wear indicators dosent mean that the two central bands are not testable, the grooves would need to be cut to the same depth as the main grooves that contain the tread wear indicators though.
The issue with this tyre is the central section grooves are not cut to the same depth as the primary grooves so would result in a pass.
Seen this tyre a fair few times now, there is a tyre called a Vredistien which is interesting to test when one comes across it.
mattersoftesting.blog.gov.uk/2014/01/24/getting-into-the-groove/

Last Edit: Mar 5, 2014 0:48:05 GMT 1 by nitros44: And edit -

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phaetonott
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Post by phaetonott on Mar 5, 2014 0:45:33 GMT 1

It doesn't matter whether the grooves have wear-bars, are they as deep as the grooves with wear -bars, or is there a step up?

Difficult to tell from those pics, but I reckon there's a step, so pass and advise.

Was it a Westlake? by any chance?

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phaetonott MOT tester Posts: 1,611 Class tested: 4 Last Online: Nov 6, 2020 17:49:52 GMT 1 Likes: 399	Measuring tread depths Mar 5, 2014 0:46:57 GMT 1 Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by phaetonott on Mar 5, 2014 0:46:57 GMT 1 I reckon nitros44 can type quicker than me
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Post by nitros44 on Mar 5, 2014 1:05:12 GMT 1

Mar 5, 2014 0:46:57 GMT 1 phaetonott said:

I reckon nitros44 can type quicker than me

Yes it appears so
But me having a good day that's all
I beleive grooves that have twi in them or moulded to the same depth is the correct phrase so to speak according to the blog.
The blog is not out of date by the way before anyone comes along as says it is.

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Post by David on Mar 5, 2014 1:08:21 GMT 1

Tread wear indicators may well become the actual RfR in the future for sure, but unless the outer edges are a Stepped Tread or Secondary Groove type they are testable areas or Primary Grooves....

More here on this gents: mattersoftesting.blog.gov.uk/2014/01/24/getting-into-the-groove/

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Gaz VTS Council member Posts: 2,157 Class tested: 4, 7 Last Online: Sept 7, 2019 10:16:48 GMT 1 Likes: 738	Measuring tread depths Mar 5, 2014 20:33:51 GMT 1 via mobile Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by Gaz on Mar 5, 2014 20:33:51 GMT 1 Yes there is a step up. The "v" part of the tread has a small step then there is a gradual slop towards the centre where the two bands are. phaetonott, yes it's a westlake
	Specialising in repairing & rebuilding Vauxhall 6 speed gearboxes www.m32guy.co.uk - info@m32guy.co.uk

David Administrator Owner\Director, AE\NT\SM, DVSA VTS Council Member, Registered Member & Administrator of The MOT Testers & AE's Forum If the facts don't fit the theory, change the facts. Albert Einstein Posts: 6,715 Class tested: 4 Last Online: Apr 29, 2024 14:14:04 GMT 1 Likes: 963	Measuring tread depths Mar 5, 2014 21:13:16 GMT 1 Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by David on Mar 5, 2014 21:13:16 GMT 1 Which blog is out of date gents?
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Post by Gaz on Mar 4, 2014 23:52:28 GMT 1

Post by baz657 on Mar 5, 2014 0:40:15 GMT 1

Post by nitros44 on Mar 5, 2014 0:43:04 GMT 1

Post by phaetonott on Mar 5, 2014 0:45:33 GMT 1

Post by phaetonott on Mar 5, 2014 0:46:57 GMT 1

Post by nitros44 on Mar 5, 2014 1:05:12 GMT 1

Post by David on Mar 5, 2014 1:08:21 GMT 1

Post by Gaz on Mar 5, 2014 20:33:51 GMT 1

Post by David on Mar 5, 2014 21:13:16 GMT 1