phaetonott
Nominated Tester
I may not be right but at least I am trying!
Posts: 376
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Post by phaetonott on May 20, 2012 8:47:15 GMT
What has to taken into consideration here is just because a groove does not have a twi contained within the groove does not mean it is not testable However Grooves that had not been cut as deep as those containing the wear indicators when new are not to be considered as part of the tread pattern. (4.1) leads me to another conclusion
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 20, 2012 10:05:53 GMT
What has to taken into consideration here is just because a groove does not have a twi contained within the groove does not mean it is not testable However Grooves that had not been cut as deep as those containing the wear indicators when new are not to be considered as part of the tread pattern. (4.1) leads me to another conclusion The bottom line to me is that in the understanding of modern tyre designs, it appears that the Testers Manual section 4.1 probably requires an update. We must also remember that tyres are more than ROUND and BLACK, some tyres are NOT designed for road use, i.e. NHS, which does not stand for the National Health Service ;D Also I don't think a tyre manuafacturer who wants to sell tyres would put a BIG BOLD NHS on the side walls with BIG arrows pointing at the letters saying LOOK HERE ;D So in a nutshell I think we have to be extra vigilent when inspecting tyres to ensure that they meet the criteria of the examination. Dave
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phaetonott
Nominated Tester
I may not be right but at least I am trying!
Posts: 376
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Post by phaetonott on May 20, 2012 14:14:01 GMT
That brings up the question of rally tyres Dave.
Some are marked" for competition use" some are marked "for competition use only" Some marked "for rally use only" which ones would you pass on MOT, they're all "e"marked and have wear bars
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Post by aylesburyjock on May 20, 2012 16:00:24 GMT
The point is that after it is worn away, and you have only the two grooves left, you have no way of knowing how deep the rest of the tread pattern was or if there were any TWI's in it at all. You are going to have to make a decision on the spot, knowing there are tyres which should pass in this condition(by VOSA's standard), but not knowing if the tyre in front of you is one of them. Remember you are not allowed to use your common sense which would tell you that something pretty near a racing slick is not a good idea. Editing to say I posted after having only read the first page
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 20, 2012 20:21:23 GMT
That brings up the question of rally tyres Dave. Some are marked" for competition use" some are marked "for competition use only" Some marked "for rally use only" which ones would you pass on MOT, they're all "e"marked and have wear bars The only instructions we are given in the TM are; Tyres with NHS, Not for Highway Use or similar markings should only be deemed acceptable if they display an ‘E’ marking and a number contained within a circle. Adjacent to this circle, the sidewall must also be marked with a six digit number, which may be preceded by 75R or similar marking (see example below). 75R – 002439 Dave
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phaetonott
Nominated Tester
I may not be right but at least I am trying!
Posts: 376
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Post by phaetonott on May 20, 2012 20:52:21 GMT
So if a car is presented with tyres bearing the sidewall marking "for rally use only" the fact that the car is being MOTd not rallied, surely that's a tyre not fitted in compliance with the manufacturers sidewall instruction
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 20, 2012 21:39:24 GMT
So if a car is presented with tyres bearing the sidewall marking "for rally use only" the fact that the car is being MOTd not rallied, surely that's a tyre not fitted in compliance with the manufacturers sidewall instruction Not quite, you see the sidewall instruction in your case is not a manufacturer instruction of how to fit the tyre to the rim, it is in fact an instruction that states "For rally use only", which means that it falls into the category; Tyres with NHS, Not for Highway Use or similar markings should only be deemed acceptable if they display an ‘E’ marking and a number contained within a circle. So you only get problems in your example above if the tyre displays an 'E' marking and a number contained within a circle. If not then the wording is similar to NHS, i.e. "for rally use only" so would be a reason for rejection. Dave
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nitros44
Nominated Tester
esto es un negocio serio
Posts: 741
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Post by nitros44 on May 21, 2012 22:41:02 GMT
It would be intresting if the rally car came in for its mot between rally stages with tyres without the "E",CIRCLE and 6 didgit number lol What do we do then? ;D
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phaetonott
Nominated Tester
I may not be right but at least I am trying!
Posts: 376
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Post by phaetonott on May 21, 2012 23:08:40 GMT
get on the next boat home from cloud coocooland Nitros, and save a seat for me
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nitros44
Nominated Tester
esto es un negocio serio
Posts: 741
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Post by nitros44 on May 21, 2012 23:17:34 GMT
get on the next boat home from cloud coocooland Nitros, and save a seat for me I take that as a "DONT KNOW THEN" ;D
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Daveg
NT & VTS Council member
I believe I am perfect, but others may differ in opinion?
Posts: 1,549
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Post by Daveg on May 22, 2012 19:38:46 GMT
Our MOT Station is already a drive - by faster than a MacDonalds even super fast fit centers can't compete with us ;D Customers driving along our fourcourt not even stopping with the windows down, how much are your tyres for this car mate? What size tyres are they? Don't you know? They keep on driving ;D They even come in for an MOT Test the same, like can you do me an mot test, when would you like it, how about now? Like how long will it be say if I go next door for a cuppa and return in say 15 - 20 minutes will it be ready for collection Do you know what goes into an mot test? Yeah I have seen loads of them done over the years, quick look round the lights and jack up the wheels and do a quick stab on the brake test and issue a pass, seen it millions of times Well that is not really what the mot test is about? Yeah you obviously don't know what you are doing I will take it somewhere else for a proper mot then? I must say we really do present an excellent image to the scheme don't we? Dave
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