 | Home > Wheels & Tyres > The tired tyre question... |
 
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) it's got me thinking.
| Ads90 Member Since: 16 Jun 2008 Location: Cots-on-the-Wolds Posts: 812   
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Re age, this from the AA:
On a previous Defender I chose to replace 4 BFG ATs at 10 years old even though there was much tread left. There were signs of cracking in places. The replacements were the same (but KO2 v. KO I think) made the ride slightly but noticeably more supple, and grip increased a little too. Not surprising really, as the rubber will harden with age. I would do the same again now - 10 years seems plenty. |
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11th Sep 2017 11:23am |
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| oneten110 Member Since: 02 Jul 2011 Location: Wish I was still in France Posts: 741
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from Rospa
Rubber compounds used in tyres contain anti-oxidising chemicals that help to slow down the natural ageing process of untreated rubber. However, tyres do deteriorate with age, which increases the risk of tyre failure. There will also be a deterioration of the ride quality caused by vibrations through the tyre, which may signify the tyre's performance has been affected by age and should be investigated as soon as possible. There is no law governing the maximum age at which tyres may be used on the roads for cars. Tyre manufacturers do not seem to have a consistent recommendation because the roadworthiness of a tyre depends on many factors, including the condition in which they are stored, the use to which they are put, road conditions, how well they are maintained and the driver’s driving style. RoSPA’s recommendation to motorists is to ask their tyre manufacturer for the age at which they recommend tyres should be changed, and to regularly check their tyres for age-related defects, such as Cracking/crazing on the side wall of the tyre, caused by its flexing Distortion of tyre tread Deformation of the carcass of the tyre Tyres that display these signs of ageing should be removed and not put to further use. Vehicles which are stored for significant periods (motorhomes, caravans, ice cream vans, classic cars, etc) are more likely to need to replace their tyres at a younger age even though the tread may well have hardly been touched. This is because tyres have agents in their compound which are squeezed through the rubber when in use to inhibit the ageing process; if unused for some time, these agents do not work, thus increasing the speed of the ageing process. Tyres fitted as spare wheels or used on caravans and trailers may age prematurely. If tyres on caravans or trailers are not in regular use, they should be inspected before each journey. Tyres used predominantly in coastal areas will age at a greater rate due to the saline conditions, and several cleaning products may also harm the chemicals in the rubber. In most circumstances tread depth can be used as a suitable indication of when tyres should be replaced, as tyre treads generally wear out before their age effects their performance. However, the age of a tyre will affect its safety and increase the risk of failure, and so tyres should be inspected for the signs of ageing regularly. Personally I have had BF Goodrich AT tyres start to break up at a shade over 2 years old and I will never use their products again. I had the same set of tyres lose grip and slide going round a curve on a motorway, in the dry, at less than 70 MPH. No other vehicle was similarly affected. |
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11th Sep 2017 3:53pm |
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