All tyres are moulded with wear markers to show when they reach a minimum tread depth. Is there any reason why this could be done by a different colour in the rubber. This would cause uneven wear across or on one side of the tyre to become instantly visible. It would also make it far easier to spot worn out tyres, especially for a M.O.T.
Any thoughts anyone.
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Roger
I read frequently, but only post when I have something useful to say.
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I imagine that putting a coloured layer in a tyre, which showed when a certain amount of wear had taken place (I think this is what you are suggesting?) would be very very expensive. The present wear markers are not too difficult to use but the fact that they are slightly inconvenient makes one look at the whole tyre from time to time which is probably a good thing!
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Putting the legal couple of millimetres (is it one or two?) aside, at what sensible point does a tyre become less efficient at shifting away the water. Is it a linear relationship with tread depth, i.e. maximum performance when new (at 8mm?)down to zilch at 0mm or does the performance drop off relatively slowly until say there's only 3mm or so of tread left? Actual performance depends on actual conditions - smooth road vs. rough/grooved road, quantity of water and so on, but can some tyre guru give us some more information.
PS I'm not comfortable with less than about 4mm of tread.
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It depends on the type of road surface. For a simple graph, look at:
tinyurl.com/ocept
V
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I've seen a report which showed that once tyre tread depth gets to 3mm or below stopping performance is significantly affected. I tend to change my tyres before they get to the tread depth indicators.
A quick Google found this:
tinyurl.com/oumj9
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Well there you go! I was just using 4mm as a gut feel minimum tread depth, it sort of felt right - it's good to know my guts are in perfect working order - time for lunch.
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On the otherhand well (though evenly) worn tyres can provide better grip and better steering response on dry roads due to the greater contact area.
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I usually note a sudden deterioration in grip on a wet roundabout on the way to work when my tread gets to 3mm.
I find it easy enough to feel the tread markers between the grooves.
In the old days when air started leaking from your tubeless tyres , that was the time to change. Ah yes, no MOT, no drink drive law, no 70mph limit, sitting on someones lap steering while they lit a fag.
Sorry, wrong thread.
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I wasna fu but just had plenty.
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Last week my Scenic was in the garage getting some work done and the garage did a wee report on the car telling me I had 4mm on the rear tyres.
Today it was back in the same garage to get a switch fixed and they phoned me to tell me that it only had 2mm on the rear!
I have lost 2mm in 500 miles - I don't think so!
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All tyres are moulded with wear markers to show when they reach a minimum tread depth. Is there any reason why this could be done by a different colour in the rubber. This would cause uneven wear across or on one side of the tyre to become instantly visible. It would also make it far easier to spot worn out tyres, especially for a M.O.T. Any thoughts anyone. --
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It is being rumoured in the trade that our "friendly" EU masters are considering regs to make tyre manufacturers incorporate a colour (white or yellow) in the moulding process. This would help the police to check at least the rear tyres of travelling vehicles. In addition to what daveyjp posted the full report of the test done by ROSPA at MIRA Nuneaton can be found in Auto Express 18 May 2005...
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It is being rumoured in the trade that our "friendly" EU masters are considering regs to make tyre manufacturers incorporate a colour (white or yellow) in the moulding process. This would help the police to check at least the rear tyres of travelling vehicles. In addition to what daveyjp posted the full report of the test done by ROSPA at MIRA Nuneaton can be found in Auto Express 18 May 2005...
My OP was on the basis it seemed a logical safety measure relating to tyres. I had never realised the EU was considering a similar measure, nor did I see daveyjp thread. Thank you all for your comments.
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Roger
I read frequently, but only post when I have something useful to say.
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