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Car MOT's and tyres

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shereen
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Joined: 15 Mar 2011
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PostPosted: 17:14 - 23 Oct 2012    Post subject: Car MOT's and tyres Reply with quote
My friends car just failed its MOT as 1 tyre was not matching Neutral

All the sizes were the same, just a different brand.......

What really? I didnt think that would matter at all.....

Can someone clarify if this is bullshit or not please.

Thanks Thumbs Up
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Joncrete Cungle
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PostPosted: 17:24 - 23 Oct 2012    Post subject: Reply with quote
I have two identical tyres on the front of my car. The rears are both different makes, same size budget shitty tyres. They have passed the last 2 MOT with no problems.

Quote:
This inspection applies to tyres fitted to the road wheels only. The vehicle presenter should be informed when it is noticed that there is a defective tyre on a spare wheel.
To identify the size and type of tyres, it might be necessary to rotate the wheels or move the vehicle. Only one sidewall of a tyre needs to be marked.
The aspect ratio of a tyre is included in the size marking e.g. a 215/55R15 has an aspect ratio of 55%.
“Standard” car tyres have a nominal aspect ratio of 82% (unless marked otherwise) and these are almost identical in size to tyres with an aspect ratio of 80% and can be safely mixed in any configuration on a vehicle. Therefore, in these circumstances Reason for Rejection 1 does not apply.
Some tyres may be marked with two sizes. For example, a 185/75R14 tyre may be dual marked 185R14.
Where a tyre is found to be dual marked by the manufacturer on the side-wall, either markings can be accepted.
Any tyre structure mix between different axles is acceptable for vehicles that have either:

2 axles and ‘twin’ wheels on the rear axle, or

3 axles, one steering and one driving.
However, this does not apply to vehicles with tyres having a road contact area of 300mm or wider.


https://mottesters.co.uk/files/special%20notices/MOT%20Inspection%20Manual.pdf
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Joncrete Cungle
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PostPosted: 17:26 - 23 Oct 2012    Post subject: Reply with quote
Quote:
A. Type of Structure
1.
Check the nominal size and aspect ratio.
Note: It cannot be assumed that there is a difference in the nominal sizes of tyres because either twin wheel is not in contact with the ground.
Note: A Class 3 or 4 vehicle tyre which appears to be of inadequate size, ply or speed rating for the vehicle or its use is not a reason for rejection. However, the vehicle presenter should be informed.
2.
Check the type of structure, i.e. radial, cross-ply or bias-belted.
Note: Steel and fabric radial-ply tyres are to be regarded as the same structure type.



Quote:
Reason for rejection

1.
a.
One tyre is of a different nominal size or aspect ratio to any other on the same axle
b.
a ‘temporary use’ or ‘space-saver’ wheel and tyre fitted as a road wheel.
2.
a.
One tyre is of a different type of structure from another tyre on the same axle
b.
a 3 or 4-wheeled vehicle fitted with single wheels, and
(i)
a cross-ply tyre or bias-belted tyre fitted on the rear axle and radial-ply tyre is fitted on the front axle, or
(ii)
a cross-ply tyre fitted on the rear axle and a bias-belted tyre fitted on the front axle
c.
a tyre of a different type of structure is fitted to a steerable axle from that fitted to another steerable axle
d.
In the case of non-steerable axles a tyre fitted to a driven axle is of a different type of structure from that fitted to another driven axle.


Or a dodgy MOT place hoping to sell a few more tyres to meet this months targets. Rolling Eyes Shocked

Last edited by Joncrete Cungle on 17:31 - 23 Oct 2012; edited 1 time in total
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covent.gardens
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Joined: 09 Jun 2012
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PostPosted: 17:30 - 23 Oct 2012    Post subject: Reply with quote
It couldn't fail because they're a different brand, and an MoT tester would know this, there's got to be a size difference or another reason.

I've put several cars through MoT's after fitting different branded part-worns.
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covent.gardens
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PostPosted: 17:37 - 23 Oct 2012    Post subject: Reply with quote
If you have the info to hand, let us know what's written on each tyre exactly as it appears.
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Nexus Icon
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Joined: 26 Aug 2010
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PostPosted: 18:35 - 23 Oct 2012    Post subject: Reply with quote
It can fail if one is unidirectional (it will have "Rotation" and an arrow marked on it) and the other on the same axle is a standard radial.

It's not a bad thing as it can make for a bloody lethal combination.
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Nb
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PostPosted: 18:59 - 23 Oct 2012    Post subject: Reply with quote
Nope, if the tyres are the same size on the same axle it cannot be failed.

Quote:
It can fail if one is unidirectional (it will have "Rotation" and an arrow marked on it) and the other on the same axle is a standard radial.

Not true, you can have a rotational or assymetrical tyre anywhere you like aslong as its fitted correctly according to the sidewall instructions.

What exactly does it say on the failure sheet Shereen?
If they are all the same size, ask for a vt17 form which will shit them up.
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binge
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Joined: 03 Jul 2004
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PostPosted: 19:17 - 23 Oct 2012    Post subject: Reply with quote
Sorry, but I smell bullshit.
Testers are not only employed by a workshop/garage. They have a schedule to stick to which is provided by VOSA.

You'll find that most testers don't give a flying fuck about the workshops daily target either.

It's probably been failed on being a rotational tyre fitted backwards, or an asymmetrical tyre fitted inside out.





Ben
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Nexus Icon
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Joined: 26 Aug 2010
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PostPosted: 20:33 - 23 Oct 2012    Post subject: Reply with quote
Nb wrote:
Nope, if the tyres are the same size on the same axle it cannot be failed.

Quote:
It can fail if one is unidirectional (it will have "Rotation" and an arrow marked on it) and the other on the same axle is a standard radial.

Not true, you can have a rotational or assymetrical tyre anywhere you like aslong as its fitted correctly according to the sidewall instructions.

What exactly does it say on the failure sheet Shereen?
If they are all the same size, ask for a vt17 form which will shit them up.


It can be true as some unidirectional tyres will clearly say "Do not mix with a radial tyre on the same axle" and this will cause a failure for incorrect fitment.
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Nb
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PostPosted: 20:40 - 23 Oct 2012    Post subject: Reply with quote
Quote:

It can be true as some unidirectional tyres will clearly say "Do not mix with a radial tyre on the same axle" and this will cause a failure for incorrect fitment.

Not seen that in the last 14 years working on cars? Thinking
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Nexus Icon
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Joined: 26 Aug 2010
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PostPosted: 21:15 - 23 Oct 2012    Post subject: Reply with quote
Nb wrote:
Quote:

It can be true as some unidirectional tyres will clearly say "Do not mix with a radial tyre on the same axle" and this will cause a failure for incorrect fitment.

Not seen that in the last 14 years working on cars? Thinking


I've had it happen, only once, but it didn't feel like I was getting ripped off Laughing
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shereen
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PostPosted: 12:59 - 24 Oct 2012    Post subject: Reply with quote
So the general consensus is bull shit? Im not sure what was on the fail sheet, just know that they told her it was because the tyre did not match the other. They also said that she could not drive it out of the garage as it was illegal.....

In the end she purchased a tyre from them and they fitted it. She then went to the garage and paid for the MOT in 1 and 2 pence coins Laughing
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supZ
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PostPosted: 14:10 - 24 Oct 2012    Post subject: Reply with quote
that'll show 'em.. Rolling Eyes

im sure they're be really upset with the needless price of a tyre + fitting they got out of her.

should be name and shamed i reckon, sounds like they just wanted to take advantage of 'the poor girl' and leech money that didnt need to be spent.
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