Click here to return to the home page.
Image of a road.
Who's Online Now
7 registered members (BigSteve, M3W55, RichardV6, HeadlessBlue, TBM, MOGSWE, Fuel.inj), 220 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 393
John V6 302
TBM 148
Alistair 135
Newest Topics
2020 Plus Four Headlights
by Artemis. 26/02/21 07:01 PM
Luggage Rack on a Roadster Sport
by ChrisP. 26/02/21 06:52 PM
Mercedes V8's at Monza
by +8Rich. 26/02/21 06:47 PM
Hublot or Zenith
by The Austrian. 26/02/21 05:50 PM
A Milestone
by Peter J. 26/02/21 03:43 PM
Electrical questions : 1934 3 wheeler Super Spo
by patrickt. 26/02/21 03:30 PM
Land Rover Overdrive?
by Hamwich. 26/02/21 02:43 PM
Latest Photos
Gearbox oil check 2nd attempt at pics
Checking gear box oil
French collection
Visiting France
Winter in Puy de Dôme
Newest Members
Andrew J., RM+8, MichaelS, Patrick McDonagh, kduc
7354 Registered Users
Forum Statistics
Forums34
Topics40,572
Posts677,957
Members7,354
Most Online1,033
Dec 28th, 2019
Today's Birthdays
GJT, Theo69
Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
Tyre advice #35848
10/10/09 06:11 AM
10/10/09 06:11 AM
Joined: Oct 2009
Posts: 552
Newcastle Upon Tyne
sawman Offline OP
Talk Morgan Regular
sawman  Offline OP
Talk Morgan Regular

Joined: Oct 2009
Posts: 552
Newcastle Upon Tyne
Guys,

I have recently purchased an '88 4/4. I suspect the tyres are the originals. (DOT code is 427) with less than 20k miles on them they are far from worn, but I suspect the compound is not at its best. The size is 165SR15 (uniroyal rallaye). I suspect that the tyres predate the current sizing style - theres no aspect ratio!- What size tyres do i need and are there any recommended brands?
edit - I'm on painted wires btw

thanks

Last edited by sawman; 10/10/09 06:13 AM. Reason: another thought
Re: Tyre advice [Re: sawman] #35849
10/10/09 06:19 AM
10/10/09 06:19 AM
Joined: May 2009
Posts: 1,554
Easter Offline
Talk Morgan Enthusiast
Easter  Offline
Talk Morgan Enthusiast

Joined: May 2009
Posts: 1,554
Hi sawman, size sounds right, a/r is 80 but tyre size pre-dates low profiles so it is often not stated. Current 4/4 Sport uses 165/80 15 Continental and they are more than adequate, buy your self a new set, I have seen them on web tyre dealers as low as 40/tyre. flag

Re: Tyre advice [Re: Easter] #35863
10/10/09 11:38 AM
10/10/09 11:38 AM
Joined: Feb 2008
Posts: 35
D
dherdebart Offline
Just Getting Started
dherdebart  Offline
Just Getting Started
D

Joined: Feb 2008
Posts: 35
On my former 4/4 4-seater (1991) I had Continental 165/80 15 and they performed well and lasted for70000kms.
On my new 4/4 Sport the same tyres are mounted.
The factory recommends 1.3 bar for the 1991 4/4 and 1.5 bar for the 4/4 Sport; this is quite low but provides a softer ride (tyre inflation of better said lack of tyre inflation is part of the Morgan suspension!)
I keep the tyre pressure at 1.8 bar which is better for roadholding and tyre life, but gives a harder ride.
D'herde Bart

Re: Tyre advice [Re: sawman] #35864
10/10/09 12:32 PM
10/10/09 12:32 PM
Joined: Feb 2009
Posts: 441
Great Britain
Rbt Aero8 Offline
Learner Plates Off!
Rbt Aero8  Offline
Learner Plates Off!

Joined: Feb 2009
Posts: 441
Great Britain
I believe that current recommendations are to change tyres every 5-6 years regardless of wear rate to protect against deterioration of the compound. spend


Rbt Aero8 thumbs
Re: Tyre advice [Re: Rbt Aero8] #35866
10/10/09 12:52 PM
10/10/09 12:52 PM
Joined: May 2009
Posts: 2,190
South Wales UK
GLLHG Offline
South Wales Correspondent
GLLHG  Offline
South Wales Correspondent
Talk Morgan Expert

Joined: May 2009
Posts: 2,190
South Wales UK
I'd agree with Robert. When I bought my 4/4 it had done very little mileage from new ( In fact, that was the reason why I almost didn't buy the car!) The result was that all of the tyres (factory -fitted Avons) were almost like new in terms of tread depth etc. The spare had never been on the car.

However, what quickly became very obvious was that the sidewalls were suspect- not least becuase they ahd become very hard.

I tend to be fairly anal about details like this, so I did some fairly extensive research and all the info confirms that 5 years is a maximum in terms of tyre life because of the degradation caused by light.

I changed the lot and am now running Yokohamas. The ride, cornering and general 'stickability' are now all a heck of a lot better


GLLHG
Re: Tyre advice [Re: sawman] #35869
10/10/09 02:13 PM
10/10/09 02:13 PM
Joined: Oct 2006
Posts: 145
Kent, England
C
chris Offline
L - Learner Plates On
chris  Offline
L - Learner Plates On
C

Joined: Oct 2006
Posts: 145
Kent, England
Originally Posted By sawman
I have recently purchased an '88 4/4. I suspect the tyres are the originals. (DOT code is 427) with less than 20k miles on them they are far from worn, but I suspect the compound is not at its best.

If there's no little triangle after those numbers then the tyres were made in the 42nd week of 1987 (if there is then they were made in the 42nd week of 1997). Either way you would be well advised to change the tyres.

As to make and type, it really depends what you want from your tyres and what kind of driving you like - but anything will give you better and safer handling than those.

As Easter says, the aspect ratio in older radials is assumed to be 80 when not stated.

Re: Tyre advice [Re: chris] #35872
10/10/09 03:46 PM
10/10/09 03:46 PM
Joined: Oct 2009
Posts: 552
Newcastle Upon Tyne
sawman Offline OP
Talk Morgan Regular
sawman  Offline OP
Talk Morgan Regular

Joined: Oct 2009
Posts: 552
Newcastle Upon Tyne
There doesn't seem to be much choice in the 165/80R15 category. Looks like I'll be getting some firestone f560, as that it all that came up on numerous searches

Re: Tyre advice [Re: sawman] #35874
10/10/09 04:02 PM
10/10/09 04:02 PM
Joined: May 2009
Posts: 2,190
South Wales UK
GLLHG Offline
South Wales Correspondent
GLLHG  Offline
South Wales Correspondent
Talk Morgan Expert

Joined: May 2009
Posts: 2,190
South Wales UK
I don't know where you're located but if it is at all practical ( and you haven't tried them already,)

try:

http://www.longstonetyres.co.uk/


GLLHG
Re: Tyre advice [Re: GLLHG] #35875
10/10/09 05:00 PM
10/10/09 05:00 PM
Joined: Dec 2008
Posts: 19,195
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 19,195
South Yorkshire
Longstone is not far from me, and since they are Borrani Agents I'm optimistic that they can balance wires properly. So when I'm ready I might just call in.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Re: Tyre advice [Re: DaveW] #35877
10/10/09 05:11 PM
10/10/09 05:11 PM
Joined: Oct 2006
Posts: 2,382
C
cerealsurfer Offline
Talk Morgan Expert
cerealsurfer  Offline
Talk Morgan Expert
C

Joined: Oct 2006
Posts: 2,382
The sprinters would recommend either:

185/55/15 Toyo Proxies T1R's

Lower and wider (which I appreciate is not quite the trad look) but don't arf stick well.

Alternatively take you pick of higher profile tyres... interestingly there is a List 1B Vintage tyre which you can get as well.. (ie. old vintage racing tyre.. which is very sticky)

Avon CR6 ZZ 70 Section tyres would be the ones to run.





Page 1 of 3 1 2 3

Moderated by  TalkMorgan 

Powered by UBB.threads™ PHP Forum Software 7.7.1