Petrol

[zx9]

Jun 8, 2023 6:40:01 GMT peterob said:

Jun 8, 2023 6:18:45 GMT mick said:

Same here. In fact on the fronts the tread was starting to separate from the rest of the tyre (Michelin Pilots). I've never experienced that before.

Mick

These posts remind me to check the tyres again.  They lose pressure "more" if the car is standing and it is important to rotate the wheel from time to time so that new tyre is in contact with the ground. if not they don't stay round.  I suspect that the composition of tyres has changed over the years to reduce losses of volatile hydrocarbons and less plasticiser means more tendency to crack. Exposure to direct sunlight won't help, neither will exposure to ozone in the air, average concentrations of which have been going up.

And you can't trust the TPMS on older cars, my BMW uses the ABS to count and compare wheel revolutions, if over a period of time all the tyres loose a similar amount of pressure it does not notice.

[andy]

Jun 8, 2023 6:40:01 GMT peterob said:

Jun 8, 2023 6:18:45 GMT mick said:

Same here. In fact on the fronts the tread was starting to separate from the rest of the tyre (Michelin Pilots). I've never experienced that before.

Mick

These posts remind me to check the tyres again.  They lose pressure "more" if the car is standing and it is important to rotate the wheel from time to time so that new tyre is in contact with the ground. if not they don't stay round.  I suspect that the composition of tyres has changed over the years to reduce losses of volatile hydrocarbons and less plasticiser means more tendency to crack. Exposure to direct sunlight won't help, neither will exposure to ozone in the air, average concentrations of which have been going up.

Rubber is expensive and limited in supply.

I've seen loads of dry-rotted bicycle tyres and they are almost always cheap plasticky ones. Expensive sticky tyres are far less prone to it IME... I've got near 20 year old tyres on one of my bikes and 30 year old tyres on another.

Handgrips too...Apollo deserve a special mention as they seem to find the cheapest rubber parts going and they are very prone to splitting.

[Ivor E Tower]

I have 2 petrol cars and rotate their use, sometimes they stand for 4 weeks. I don't trust this modern E10 muck and use super unleaded in both.

Tyres - apparently as "we" motorists love to corner more enthusiastically, the manufacturers have produced higher-grip formulations that wear out faster and deteriorate faster in sunlight. The number of tyres with low mileages that are cracking and unsafe has been noted in the MoT statistics since lockdown, at least this has been reported but I've not seen the figures directly myself.

Funnny thing is that back in the 1980's I could get 50,000 miles or more out of a set of skinny, fairly high-profile 13" or 14" diameter tyres on a front-wheel drive car. Nowadays I struggle to get half that mileage out of much fatter but lower-profile and larger diameter tyres. One of my former vehicles used to get through a set of front tyres aout every 10,000 miles and it didn't seem to matter what the brand was or how much I paid. The vehicle only had 113bhp (but was an MPV) so it wasn't because of its high performance that the tyres wore so quickly. I suspect the manufacturers are making them wear out faster to boost their sales

[JohnY]

Jun 8, 2023 19:52:26 GMT Ivor E Tower said:

I have 2 petrol cars and rotate their use, sometimes they stand for 4 weeks. I don't trust this modern E10 muck and use super unleaded in both.

Tyres - apparently as "we" motorists love to corner more enthusiastically, the manufacturers have produced higher-grip formulations that wear out faster and deteriorate faster in sunlight. The number of tyres with low mileages that are cracking and unsafe has been noted in the MoT statistics since lockdown, at least this has been reported but I've not seen the figures directly myself.

Funnny thing is that back in the 1980's I could get 50,000 miles or more out of a set of skinny, fairly high-profile 13" or 14" diameter tyres on a front-wheel drive car. Nowadays I struggle to get half that mileage out of much fatter but lower-profile and larger diameter tyres. One of my former vehicles used to get through a set of front tyres aout every 10,000 miles and it didn't seem to matter what the brand was or how much I paid. The vehicle only had 113bhp (but was an MPV) so it wasn't because of its high performance that the tyres wore so quickly. I suspect the manufacturers are making them wear out faster to boost their sales

and in so doing increase the quantity of particulate pollution.

Thanks for leaving your last sentence un-stopped so that I could just continue to finish it.

[andy]

Touch wood none of the Michelin CrossClimates I've had have perished before I've scrubbed them out, unlike the Bridgestone Touranza which bubbled in the centre of the tread and blew out on me on the A702 well before they were worn down to the legal limit. Not that all-season tyres make much sense if a car never sees snow as they increase fuel consumption and stopping distances.

They're utterly hopeless on snow and ice but the Continental summer tyres I have seem to have lasted well. Not sure the model but I think they are a premium touring tyre. I don't like that they have eco in the name but I got them for free.

[geoffr]

Jun 8, 2023 20:23:55 GMT JohnY said:

Jun 8, 2023 19:52:26 GMT Ivor E Tower said:

I have 2 petrol cars and rotate their use, sometimes they stand for 4 weeks. I don't trust this modern E10 muck and use super unleaded in both.

Tyres - apparently as "we" motorists love to corner more enthusiastically, the manufacturers have produced higher-grip formulations that wear out faster and deteriorate faster in sunlight. The number of tyres with low mileages that are cracking and unsafe has been noted in the MoT statistics since lockdown, at least this has been reported but I've not seen the figures directly myself.

Funnny thing is that back in the 1980's I could get 50,000 miles or more out of a set of skinny, fairly high-profile 13" or 14" diameter tyres on a front-wheel drive car. Nowadays I struggle to get half that mileage out of much fatter but lower-profile and larger diameter tyres. One of my former vehicles used to get through a set of front tyres aout every 10,000 miles and it didn't seem to matter what the brand was or how much I paid. The vehicle only had 113bhp (but was an MPV) so it wasn't because of its high performance that the tyres wore so quickly. I suspect the manufacturers are making them wear out faster to boost their sales

and in so doing increase the quantity of particulate pollution.

Thanks for leaving your last sentence un-stopped so that I could just continue to finish it.

So, when are you going to stop shedding particulates?

[John Farrell]

The tyres replaced on my car were Japanese - the car is a used import from Japan. The new tyres are a Chinese brand called Goodride...

[andy]

Jun 8, 2023 22:15:52 GMT John Farrell said:

The tyres replaced on my car were Japanese - the car is a used import from Japan. The new tyres are a Chinese brand called Goodride...

I'm tempted to try a Chinese brand called Comforcer. Is a Goodride preferable?

[John Farrell]

Jun 8, 2023 22:25:15 GMT andy said:

Jun 8, 2023 22:15:52 GMT John Farrell said:

The tyres replaced on my car were Japanese - the car is a used import from Japan. The new tyres are a Chinese brand called Goodride...

I'm tempted to try a Chinese brand called Comforcer. Is a Goodride preferable?

I know nothing about Chinese tyres...apart from stories about Russian trucks breaking down because of them.

[andy]

Jun 8, 2023 22:35:11 GMT John Farrell said:

Jun 8, 2023 22:25:15 GMT andy said:

I'm tempted to try a Chinese brand called Comforcer. Is a Goodride preferable?

I know nothing about Chinese tyres...apart from stories about Russian trucks breaking down because of them.

Wonder if that's like the French trucks breaking down on the Germans in WW2....they lowered the marks on the dipstick so they ran low on oil, allegedly.