Re: [Chrysler300] re tires, etc for 300 cars

[Edward Mills Antique Tractors <millserat@xxxxxxxxxxxxx>]

Chemical curing ???? vs Vulcanizing - I would like to know more if there 
is any truth to chemical curing of tires????

Don't know about that - but all products regardless of how cured will 
age - and the aging is a Chemical process which is aggravated by UV 
light, ozone, and other factors including static load. And in general 
the aging rate will accelerate with heat - all other things being equal 
- at a rate of 2x for every 10 degrees C (18F).

Typical first effect of aging is hardening of rubber - which will affect 
grip - particularly in wet conditions. It may also result in chunking 
removal of tread in cornering - I have personal experience with this on 
4 year old Continental (General) tires on a 2005 F250 and on 8 year old 
trailer tires. The cracking most associate with aging is also a result 
of hardening when rubber loses its elongation capability.

That does not mean old tires can't be used for low speed use and static 
display - I have a pair of 1937 vintage Goodrich rear tractor tires with 
plenty of cracks filled with silicone that are still holding air on a 
1937 tractor.

Had a set of OE 1971 Goodyear Polyglas on my low miles 71 Charger 500 
but they were parked static for 30 years or more and were severely 
deteriorated - cracks around the bulge at bottom of tire - went thump 
getting it out of where it was parked - had to be replaced to drive it.

As others have said, I would really hesitate from using a tire that is 
10 or more years old at speed - even in the unlikely event that they 
show no visible issues such as cracking. Damage to car from blowing a 
tire can be significant even if you don't lose control.

On 11/20/2011 6:00 AM, christopher beilby wrote:
>
>
> I may have missed it, sorry if I did.
>
> Apart from cost of tires for 300s, other collector cars, I believe 
> today there is a 2nd issue that did not exist when tires that may 
> still be on our cars were made 10-30 years ago?
>
> I was told years ago, all tires were vulcanised, made/cured if you 
> like, by heat from steam - likely by passing them thru some steam heat 
> process?
> But then, some manufacturers, or maybe many/most - who knows?!! - went 
> to a chemical curing/making process, as it cheaper.
> And here is where I get more vague, questioning, of those who know 
> more - I am told that from the day they made, these chemical cured 
> tires start to self destruct, and that why some tire brands have time 
> warranties, in some cases maybe only 4-5 years, despite they 
> recognised good brands??!!
>
> Amongst the later posts current on this topic I saw I think that 
> Cooper warranties it's tires near forever timewise - so obviously they 
> are not using self destruct chemical curing?! But against this, I 
> learn in US motorcycle tires are illegal for use if over I think 6 
> years old - and date stamp checked?
>
> Does anybody know anything more certain than my maybe misdirected 
> beliefs/knowledge - what tires today are chemically cured, what 
> manufacturers still make tires like maybe Cooper do, that last, have 
> warranties, until worn out?!
>
> I recently have bought 3 sets of wide white radials, and I will never 
> wear them out soon, but if they going to become dangerous because of 
> chemical self destruction after say 5/6 years, this another thing to 
> factor in if outlaying $1,200?!
> Anyone add anything real certain, or if not, can someone in US maybe 
> contact Coopers and ask what gives, who does what, is 'chemical curing 
> self destruction' an old wives tale??!
>
> Christopher in Australia
>
>
>
> > CC: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com>
> > To: crc@xxxxxxxxxxxxxxx <mailto:crc%40cyberlink.bc.ca>
> > From: mmoore8425@xxxxxxx <mailto:mmoore8425%40aol.com>
> > Date: Sat, 19 Nov 2011 06:39:42 -0800
> > Subject: Re: [Chrysler300] re tires, etc for 300 cars
> >
> > Fern, here is my dilemma:
> > Over 50 years, I have acquired and kept three collector cars. Two 
> were family cars I just wouldn't part with.
> >
> > My 1963 E Type Jaguar has Dunlop Supersport tires on it, which I 
> paid $1200 for. They are wonderful tires for that car. They have 
> 10,000 miles on them but are 10 years old.
> >
> > My TR3 HAD a set of top Michelin tires, for which I paid $1000 for. 
> They were 12 years old with maybe 5,000 miles on them when I sold them.
> >
> > My 300H tires, replaced with Am Classic last summer were like new, 
> but I bought them in 1982.
> >
> > In other words, tires on our collector cars "age-out" long before 
> they wear out.
> >
> > I chose to buy a set of Vredstein tires for $100 ea for my TR3, and 
> they work great. I think the Michelins were better tires, but if I'm 
> going on the freeway, I prefer new Vredsteins to 12 year old anything.
> >
> > I also have two other daily driver cars, so keeping 5 cars on safe 
> tires at a reasonable cost can be a daunting prospect for some of us.
> > Mike Moore 300H
> >
> > On Nov 18, 2011, at 5:53 PM, Fern wrote:
> >
> > > I've been reading this tread re tires, etc for our chrysler 300 
> letter cars. I find it rather weird that some members that although 
> their collectors cars are now worth rather big bucks compared to when 
> they acquired them years ago, they are not willing to spend the 
> appropriate amount of $'s to make sure that they are as road worthy as 
> possible. As far as I'm concerned, safety really comes into play with 
> all this. My opinion on choice of tires is to get what is the best 
> tire to do the job and forgot this nonsense as to whether is has wide 
> white wall or narrow sidewall. When I had my 65 300L ht restored about 
> 15 years ago, I was not able to find proper 14 inch tires for it plus 
> the availability of factory hub caps was next to nil(the factory ones 
> are not really nice looking to start with) plus the price for really 
> nice ones was prohibitive so I converted to 15 inch wheels using the 
> magnum 500's with the spinner options. Most people on the street will 
> not remembe r as to whether these cars had wide whitewalls tires, etc 
> so why are we wasting lost of money in trying to make to 100 % 
> factory. Now let's remember that this is a hobby so let's quit 
> worrying about using crappy bias ply tires as what these came with 
> from the factory. I will always make sure that I have excellent tires, 
> brakes and suspension on any of my vehicles. One cannot put a price on 
> safety. I hope that I haven't offended any of you purists but this is 
> my two cents worth. Cheers from Fern with 300H convertible and 300L ht 
> and still to restore 300L 4 speed conv.
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
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