On Wednesday, 19 October 2016 at 16:27:26 UTC+1, David wrote:
On Fri, 09 Sep 2016 14:55:58 +0100, John wrote:
Andy Cap was thinking very hard :
I've use it from time to time, to spruce them up but the guy in
National tyres today, made the comment that it rots the rubber. I've
never noticed a problem.
Is there any truth in it or it it BS?
Andy C
Not sure if I've asked this question before or not - if I have, I can't find the replies so a refresh of my memory is needed anyway. And I'm
sorry to hijack your thread but my question does fit in with tyre rot
etc. :D
About three months ago I bought an '05-plated Lexus RX300. The spare
wheel sits in a plastic carrier that is mounted under the car and the
tyre on it has hardly ever been used, it truly is 'like new'. Trouble
is, it's dated 2005 like the rest of the car so it's 11-years old. Is it safe to use as a 'normal' everyday running tyre or not? I don't need a spare as an 85-litre LPG tank now sits where the spare used to, hence wondering if I can bring the spare into daily use.
I've just changed the spare on a 'P' registered car.
Not been used (or perhaps once?) since we bought the car around 2007.
Given that the 4 wheels in use had been "reprofiled" with slightly
skinnier rubber it was probably not used by the previous owner either.
Who knows, it could have been original.
Anyway, looking at it one day I saw fissures all round the tyre following
the gaps in the tread. So obviously beyond serviceable life.
I also had a camper tyre with loads of tread blow out on me (thankfully at very low speed) and AFAICR that was less than 10 years old but starting to suffer from small side wall cracks.
You probably can't tell by looking at it, but I would be tempted to change
it for a new one and then rotate the wheels including the spare on a
regular basis (as they used to recommend for all cars). I seem to remember
a diagram where you swapped corners diagonally with one tyre going in as
the spare and the spare coming out.
One thing - IIRC some "sportier" tyres are asymmetric and so need to be fitted to match the side of the car they are on. As far as I can see this makes rotation (apart from front to back on the same side) a non-starter unless you get the tyre changed round on the rim. Your spare is also only "correct" for one side of the car.
Ah - http://www.blackcircles.com/general/tyre-rotation although this
doesn't include the spare (if you are lucjy enough to have one).
Cheers
Dave R
--
Windows 8.1 on PCSpecialist box
Hi, Silicone based tire dressings definitely do degrade tires.
I regularly used the aerosol-based products on my car every week when cleaning it.
I have had two separate experiences with degraded rubber in recent years until I figured it out.
I bought a very expensive set of premium all-weather tires for my Hyundai Tuscon. Within a year
these had deteriorated to the point where the side walls and edge tread were crazed and cracked.
Thinking this was a manufacturing fault with the rubber compound I contacted the supplier and was given a full refund.
I then changed to another premium brand and again bought an expensive set of all-weather tires.
About 8 months into their life, it was picked up as an advisory on an MOT that the side walls and tread were crazed and cracking.
The MOT tester said he had seen it on countless occasions with dressed tires. He blamed the silicone in the tire dressing for attacking.
the rubber and drying out the surface making them crack. He even said that the silicone compound on the tire
was actually dissolving his rubber gloves that he had on while carrying out the inspection.
I have since swapped to a water-based product on my latest car and after 18 months have not had an issue..
So be very aware, the silicone-based sprays definitely cause rubber deterioration in your tire side walls.
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