Why no coloured tyres?

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Offline dentstudent

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Why no coloured tyres?
« on: 21/06/2007 07:54:51 »
We've done coloured trees, but why is there no car tyre manufacturer supplying coloured tyres? I remember the old white-walls, but many of those where only white plastic covers....

Wouldn't you want pink tyres on your pink RR Phantom?

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #1 on: 21/06/2007 09:09:37 »
For a start I wouldn't buy a Rolls. They're for nouveau riche Essex car dealers. Real gentlemen will always choose Bentley. At least, they did when Bentley was still British.
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Offline dentstudent

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Why no coloured tyres?
« Reply #2 on: 21/06/2007 09:14:35 »
Or an Aston.....

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #3 on: 21/06/2007 09:33:27 »
Or an Aston.....

You mean like my Vantage?  [^]
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Offline dentstudent

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Why no coloured tyres?
« Reply #4 on: 21/06/2007 09:46:23 »
Well, I was thinking more DB4, DB5, DB6 Volante, but I suppose a Vantage qualifies  [;)]

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #5 on: 21/06/2007 09:48:05 »
It qualified for getting me banned for speeding  [V]
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Offline dentstudent

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Why no coloured tyres?
« Reply #6 on: 21/06/2007 09:57:22 »
Too bad chap! Must have been a biggie!

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #7 on: 21/06/2007 10:06:05 »
Not really. Only 2 and a bit times the motorway limit.
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Offline dentstudent

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Why no coloured tyres?
« Reply #8 on: 21/06/2007 10:09:07 »
Tsk. That hardly counts. Coppers, eh?

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #9 on: 21/06/2007 10:10:22 »
Yeah, no sense of humour  [>:(]
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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #10 on: 21/06/2007 10:12:14 »
I didn't endear myself at the court either. A policeman said to me "You were pushing it a bit" to which I replied "No, If I was pushing it I'd have been doing over 190"
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Offline dentstudent

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Why no coloured tyres?
« Reply #11 on: 21/06/2007 10:17:44 »
Yes, the whole legal system seems to have had a humour bypass. So, which Vantage? I take it you still have it?

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #12 on: 21/06/2007 10:20:19 »
V8. Yes, I still have it but until I get a bit of no claims back I'm driving a 730i.
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Offline dentstudent

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Why no coloured tyres?
« Reply #13 on: 21/06/2007 10:24:18 »
I always liked the old 635i, but more so the 8 series. I just love that big 2dr coupé look.

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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #14 on: 21/06/2007 12:46:09 »
I had a 635CSi a few years back. Lovely car.
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Offline eric l

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Why no coloured tyres?
« Reply #15 on: 21/06/2007 13:28:57 »
Back to the coloured tyres :  I remember asking that question on occasion of a guided tour in a car assembly plant.
One of the reasons apparently is that there is some recycled rubber used in making the tyres, not always the same amount though.  This would make it more difficult for other pigments to give constant colour.  With carbon black, it does not matter much if you have exactly 1.00 % or 0.95 % or 1.05 % in the compound.  (Mind you, these are by no means the rates used in the real world).
Furthermore, carbon black does not age or shift in colour under influence of sunlight, and it helps dissipating heat.
And finally :  consider the stock your tyre repair/replacement shop would have to keep to match all those colours of car bodies. 
"Wonder is no wonder" (Simon Stevin 1548-1620)

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Offline dentstudent

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Why no coloured tyres?
« Reply #16 on: 21/06/2007 13:36:47 »
Yup, all good points.

But I haven't even seen bespoke (ahahaha) tyres on stupidly wealthy peoples cars. There could quite conceivably be a rubber (vulcanised?) paint that could be a side-wall covering for example.

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Offline daveshorts

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Why no coloured tyres?
« Reply #17 on: 21/06/2007 15:47:44 »
I guess that because everyone else's tyres are black, they would very quickly get covered with rubber dust and cease to be such an exciting colour. I intuitively think of black rubbers as being much tougher than coloured ones, especially white or clear rubbers, I don't know whether this is a real effect. What colour is raw vulcanised rubber?

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Offline kdlynn

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Why no coloured tyres?
« Reply #18 on: 21/06/2007 16:34:09 »
pure vulcanized rubber is usually white, and the black that is added is what makes the rubber hard enough to be a car tire. other colors wouldn't make it hard enough. before anyone thinks i just pulled that out of nowhere lol my dad is an engineer at a company that makes feedscrews and other machinery for making tires and other rubber products. he actually helped design the machine that does the rubber recycling

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Offline daveshorts

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Why no coloured tyres?
« Reply #19 on: 21/06/2007 17:26:32 »
Ah so you get a composite material, of hard black lumps (are they carbon) set into rubber, which makes it flexible and tough. You would have to find something coloured with similar properties to the carbon if you wanted to make a coloured tyre.

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Offline Bored chemist

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Why no coloured tyres?
« Reply #20 on: 21/06/2007 22:14:51 »
The carbon also acts as a UV stabliser and an anti oxidant. Good luck finding any other pigment that can do all these things.
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Offline DoctorBeaver

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Why no coloured tyres?
« Reply #21 on: 22/06/2007 20:18:42 »
The carbon also acts as a UV stabliser and an anti oxidant. Good luck finding any other pigment that can do all these things.

You mean like this? http://www.freepatentsonline.com/20020128366.html
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Offline Karen W.

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Why no coloured tyres?
« Reply #22 on: 23/06/2007 09:47:21 »
What a cool site Doc.. Thanks..

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Offline mikiex

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Why no coloured tyres?
« Reply #23 on: 23/06/2007 11:24:39 »
There is no reason why you can't have coloured tyres, I've seen some in blue.
Also at least one motorcycle tyre company makes different coloured ones.
They look ugly though :)

The big names don't seem to do it, so I would keep away from them myself

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Offline Bored chemist

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Why no coloured tyres?
« Reply #24 on: 23/06/2007 14:23:41 »
The patent office don't check if an invention works or not.
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Offline Atomic-S

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Why no coloured tyres?
« Reply #25 on: 24/06/2007 07:18:32 »
I would not know if it is scientifically possible to make rubber in colors tough enough for this purpose; (for whatever it may be worth, my experience with air hoses has been that black rubber holds up better than red, and with electrical cords that white rubber [or whatever] holds up better than brown or black). However, given the propensity of auto junkies to adorn their craft with all manner of doodads such as oversize rims and spinning hubcaps, I would think that the colored tire idea might be marketable in the form of designer stick-on labels that you would stick onto your tires the way round labels are stuck onto Compact Disks you record.