Lotus Elan

How old are my tyres ?!

PostPost by: huggy59 » Sun Nov 20, 2022 5:59 pm

Frigthening day on wet roads today ... Make me think how old my tyres are ?

Quite easy for front ones: JKD3817 is 38th week of 2017 isn't it?
Image

But more complicated for rear (Firestone F590).
No DOT number and 02 52725 or 0226188-S don't speak to me: 26th week of 2002 ?! But didn't match post or pre 2000 tyre age decoder :?
Could explain funny roadholding on wet with 20 years old tyres at the back and 5 years one at front !
Image

But would like to be sure, any help appreciated !
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PostPost by: ericbushby » Sun Nov 20, 2022 7:16 pm

Hi,
I do not think either of those marks are date codes. Look for four numbers in a rectangle with rounded ends (oval)
Week first, then year. Are your tyres so old that they predate the date code system. I think mine were when I spun
off a wet road. I had no idea how old they were.
Cheers
Eric in Burnley
1967 S3SE DHC
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PostPost by: mbell » Sun Nov 20, 2022 8:41 pm

huggy59 wrote:Frigthening day on wet roads today ... Make me think how old my tyres are ?



It's interesting but does it matter? Sounds like they need replacing either way. They aren't making new plus 2 or new you but they are making new tyres....
'73 +2 130/5 RHD, now on the road and very slowly rolling though a "restoration"
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PostPost by: Fred Talmadge » Sun Nov 20, 2022 9:02 pm

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PostPost by: ericbushby » Sun Nov 20, 2022 10:59 pm

Thank you Fred
That is better. Now I understand it
Eric in Burnley
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PostPost by: huggy59 » Tue Nov 22, 2022 1:28 pm

Finally found on inner side (only) of rear tyres

Image

33th week of 2003, nearly 10 years old: Time for a change
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PostPost by: richardcox_lotus » Tue Nov 22, 2022 1:37 pm

huggy59 wrote:Finally found on inner side (only) of rear tyres

Image

33th week of 2003, nearly 10 years old: Time for a change


I think you’ll find that’s 20 !
Richard
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PostPost by: ericbushby » Tue Nov 22, 2022 5:37 pm

Yes, that is the mark I was trying to describe
Eric in Burnley
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