Click here to return to the home page.
Image of a road.
Who's Online Now
12 registered members (Scrambledsignals, Barry M, +8Rich, bmgermany, Taffmog, DJC, IcePack, BobtheTrain, James B W, Heinz, TBM, Treesurveyor), 211 guests, and 20 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 358
John V6 295
Alistair 163
Peter J 141
Newest Topics
Bloodhound project
by +8Rich. 25/01/21 09:42 PM
Rip Off Quotes
by Moggo. 25/01/21 09:27 PM
Rad Work
by Treesurveyor. 25/01/21 06:05 PM
Second and Foremost
by BobtheTrain. 25/01/21 05:02 PM
M3W Fuel Pump
by Dab of oppo. 25/01/21 04:56 PM
BMW towbars are made of gold
by IMHO. 25/01/21 11:11 AM
Happy Burns Night
by pandy. 25/01/21 09:10 AM
Latest Photos
Another High Level brake light
Morgan puzzle made to order
TOK 258 drawings
Two Approaches to the Easy Up Hood Stay
Vaccine is totally safe
Newest Members
bear65, Mogster +4, JimV6, IainG, Ollie
7346 Registered Users
Forum Statistics
Forums34
Topics40,343
Posts672,237
Members7,346
Most Online1,033
Dec 28th, 2019
Today's Birthdays
No Birthdays
Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
Tyre age and renewal #675248
28/11/20 09:54 PM
28/11/20 09:54 PM
Joined: Sep 2012
Posts: 34
NSW, Australia
N
Neil49 Offline OP
Just Getting Started
Neil49  Offline OP
Just Getting Started
N

Joined: Sep 2012
Posts: 34
NSW, Australia
Hello there.

The tyres on our '86 +4 are Avons - CR338 front and ZV1 rear. The date marks are; front 415< and rear 309<. As I understand it this means the front ones are 25 years old and the rear 21. Is this correct?

We would appreciate suggestions for replacement Avons, and how they balance the wheels. We are in Australia.

Neil


+4 1986 - Royal Ivory / Blue
Volvo 123GT 1967 - Pearl White / Brown (pristine and very rare)
Re: Tyre age and renewal [Re: Neil49] #675249
28/11/20 10:15 PM
28/11/20 10:15 PM
Joined: Nov 2011
Posts: 3,861
Australia - NSW North Coast
OZ 4/4 Offline
Talk Morgan Addict
OZ 4/4  Offline
Talk Morgan Addict

Joined: Nov 2011
Posts: 3,861
Australia - NSW North Coast
Neil, are you sure you can only find 3 numbers? - there should be 4.

Tires manufactured after 2000 have “Stamped” on the outer sidewall of each tire is its birth date in a straightforward week/year format.
Scan the tire sidewall in a clockwise pattern and find the letters “DOT” (which signifies the tire’s compliance with U.S. Department of Transportation’s laws & regulations).
Just to the right of “DOT” (going clockwise) are a series of letters and numbers, followed by an encircled group of four, tightly spaced numbers – these are the numbers you need.

The first two numbers represent the week of manufacture, the last two numbers indicate the year.

You should consider replacing tyres, regardless of tread condition at around 7 years. Talk to the boys at MOCA or your favoured tyre dealer for a recommendation on a set of matching "new shoes"
Tyre replacement article

Most recognised tyre fitters should be able to balance your wires but ask them first if they have the right equipment and are confident to do it. When I changed the tyres on my 2011 4/4 the fitter said the biggest problem with balancing old wires is that they are often out of round and need adjustment. My new stainless wires were no problem.




A Morgan Identified Fastidious Owner...
2011 4/4 Bespoke, 1981 Delorean, Auburn Boat Tail
Re: Tyre age and renewal [Re: Neil49] #675250
28/11/20 10:18 PM
28/11/20 10:18 PM
Joined: Nov 2018
Posts: 2,743
Northants, UK
TBM Online content
Talk Morgan Expert
TBM  Online Content
Talk Morgan Expert

Joined: Nov 2018
Posts: 2,743
Northants, UK
Tyres produced after 2000 have a 4 digit date code (WW/YY) so your assumptions may be correct. They are at least 20+ years old, and about 15+yrs overdue a change!

I'd recommend Avon ZV7.

Need to find someone who specialises in wirewheel balancing - can't help with that, sorry.


1972 4/4 4 seater - 3G Morganeer
Too many ratty motorbikes
Re: Tyre age and renewal [Re: Neil49] #675254
28/11/20 10:52 PM
28/11/20 10:52 PM
Joined: Jun 2015
Posts: 733
North Somerset, UK
Deejay Offline
Talk Morgan Regular
Deejay  Offline
Talk Morgan Regular

Joined: Jun 2015
Posts: 733
North Somerset, UK
When there are only 3 numbers, the tyre was manufactured prior to 2000. The first 2 digits are still the week number and the third number is the year of the decade in which they were made. Unfortunately, exactly which decade cannot be identified! So, Neil’s assessment is probably correct but of course they could even be 10 years older, as that would still fit the age of the car, though recorded mileage might suggest that to be highly unlikely.
Changing the tyres will not only be safer but should transform the ride.


Doug

2011 +4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
Re: Tyre age and renewal [Re: Neil49] #675257
28/11/20 11:13 PM
28/11/20 11:13 PM
Joined: Sep 2012
Posts: 34
NSW, Australia
N
Neil49 Offline OP
Just Getting Started
Neil49  Offline OP
Just Getting Started
N

Joined: Sep 2012
Posts: 34
NSW, Australia
Thanks for the input.

I should have mentioned that the mileage is 64,000. I don't have a record of tyres at delivery but someone will know what they were supplying then. The first owner specified several deviations to a standard car and may have asked for different tyres.

I think we all agree that new rubber would be a good move. It drives beautifully now, but the prospect of it being better is still appealing.

I will see if I can get Avon ZV7 and have reached out to MOCA for suggestions on where to go.


+4 1986 - Royal Ivory / Blue
Volvo 123GT 1967 - Pearl White / Brown (pristine and very rare)
Re: Tyre age and renewal [Re: Neil49] #675259
28/11/20 11:32 PM
28/11/20 11:32 PM
Joined: Jul 2007
Posts: 18,793
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
Member of the Inner Circle

Joined: Jul 2007
Posts: 18,793
Suffolk
Yes 3 numbers mean prior to 2000.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Tyre age and renewal [Re: Neil49] #675265
29/11/20 01:35 AM
29/11/20 01:35 AM
Joined: Dec 2017
Posts: 949
Evergreen, Colorado, USA
britmog Offline
Talk Morgan Regular
britmog  Offline
Talk Morgan Regular

Joined: Dec 2017
Posts: 949
Evergreen, Colorado, USA
Originally Posted by Neil49


I think we all agree that new rubber would be a good move. It drives beautifully now, but the prospect of it being better is still appealing.


I wouldn't be thinking about an improved ride I would be thinking about staying alive with tires that old.

Last edited by britmog; 29/11/20 01:38 AM.

Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)
Re: Tyre age and renewal [Re: britmog] #675267
29/11/20 06:46 AM
29/11/20 06:46 AM
Joined: Oct 2014
Posts: 4,412
Austria, Vienna area
The Austrian Offline
Part of the Furniture
The Austrian  Offline
Part of the Furniture

Joined: Oct 2014
Posts: 4,412
Austria, Vienna area
Originally Posted by britmog
I wouldn't be thinking about an improved ride I would be thinking about staying alive with tires that old.

👍

and any tire will improve the ride


Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life
Re: Tyre age and renewal [Re: Neil49] #675275
29/11/20 08:57 AM
29/11/20 08:57 AM
Joined: Jul 2007
Posts: 18,793
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
Member of the Inner Circle

Joined: Jul 2007
Posts: 18,793
Suffolk
You will amazed how it changes the cars handling & ride. Do it, right now it is a death trap.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Tyre age and renewal [Re: Neil49] #675286
29/11/20 09:51 AM
29/11/20 09:51 AM
Joined: Aug 2014
Posts: 865
Northern Germany
bmgermany Online sad
Talk Morgan Regular
bmgermany  Online Sad
Talk Morgan Regular

Joined: Aug 2014
Posts: 865
Northern Germany
Changing such old tyres means 200% (or more) safety!


2005 4/4 1800ccm Duratec and a lot of HONDA CX500.......
Page 1 of 3 1 2 3

Moderated by  TalkMorgan 

Powered by UBB.threads™ PHP Forum Software 7.7.1