Lancia Motor Club Forum Banner
05 December, 2024, 07:33:03 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Need to contact the Forum Administrator? e-mail forum.admin@lanciamc.co.uk     -      Copy deadline for Viva Lancia is 12th of each month.      -      For Events e-mail events@lanciamc.co.uk      -      To Join the club go to http://www.lanciamc.co.uk/join.htm
 
   Home   Help Search Calendar Register  
Pages: [1] 2   Go Down
  Print  
Author Topic: Tyre Pressure for Michelin XAS  (Read 14514 times)
0 Members and 1 Guest are viewing this topic.
nthomas1
Rebel Poster
*
Posts: 859



« on: 13 August, 2015, 09:59:59 PM »

From experience, what is the optimum tyre pressure for Michelin XAS tyres on standard S2 Coupe steel rims - for normal driving with one or two on board?  Thanks in anticipation, Norm
Logged

Norm Thomas
Ormskirk, Lancashire

Own:
1973 Fulvia S2 Coupe
Previous Lancias: S2 Coupe and S3 Coupe in late 1970s
lancialulu
Press Officer
Permanent resident
*****
Posts: 5051



« Reply #1 on: 14 August, 2015, 07:06:25 AM »

Around 24psi all round. Are they new rubber?
Logged

Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
nthomas1
Rebel Poster
*
Posts: 859



« Reply #2 on: 14 August, 2015, 07:24:35 PM »

Thanks for the response.   Based on appearance I'm guessing they were fitted in the last 12 to 18 months.
Logged

Norm Thomas
Ormskirk, Lancashire

Own:
1973 Fulvia S2 Coupe
Previous Lancias: S2 Coupe and S3 Coupe in late 1970s
lancialulu
Press Officer
Permanent resident
*****
Posts: 5051



« Reply #3 on: 14 August, 2015, 07:28:46 PM »

If they squeal round the round abouts they may be a bit older Wink
Logged

Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
rogerelias
Rebel Poster
*
Posts: 955


MY 1600HF IN HEARTBEAT GARAGE


« Reply #4 on: 14 August, 2015, 08:01:34 PM »

look on the sidewall and you may see numbers like  2314 or similar in small numbers, which means tyres were made the 23rd week of 2014,
Logged

FULVIA 1600HF LUSSO
1958 VELOCETTE MAC
Triumph Bonneville t120v 1972
1968 MGC ROADSTER
1958 Series 2 Appia berlina
davidwheeler
Permanent resident
**
Posts: 1485



« Reply #5 on: 15 August, 2015, 08:35:06 AM »

According to the handbook, 1.5Kg/sq.cm = 21.3psi to 1.7Kg/sq.cm = 24.1 psi for long runs fully loaded at high speed front and rear.
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
nistri
Megaposter
*
Posts: 564


« Reply #6 on: 24 August, 2015, 06:23:48 AM »

If the  tyres were made recently, they may need a much higher pressure (usually 2 bar).
Andrea
Logged

Andrea Nistri

Ardea S2
Appia S2
Fulvia GTE
Fulvia Sport 1.3 S
Fulvia Montecarlo
Fulvia Coupe 1.3 S
the.cern
Permanent resident
**
Posts: 1494


« Reply #7 on: 24 August, 2015, 09:17:20 AM »

I had noticed that, in general, required tyre pressures tend to higher now compared with say 30 or 40 years ago. Way back then, 24psi would be fairly standard, whereas now, as Andrea has suggested, 2bar (29psi), if not higher, say 2.3bar (34psi) seems routine.

Is anyone able to shed some light on this shift please?

                                                       Andy
Logged
John B
Lapsed
Senior Member
*****
Posts: 133



« Reply #8 on: 24 August, 2015, 09:46:01 AM »

Would it be anything to do with the change from cross ply to radial ply tyres?
Logged

1961 Appia S3
1969 Fiat 850 Special
lancialulu
Press Officer
Permanent resident
*****
Posts: 5051



« Reply #9 on: 24 August, 2015, 11:01:49 AM »

Most likely due to side walls being lower profile on more modern tyres. So if running non standard lower profile tyres like I do I tend to go to 2bar.

Cant remember when Lancia stopped fitting crossplies but it must be pre Aprilia.
Logged

Its not the winning but taking part! or is it taking apart?
Lancias:
1955 Aurelia B12
1967 Fulvia 1.3HFR
1972 Fulvia 1600HF
1972 Fulvia Sport 1600
1983 HPE VX
1988 Delta 1.6GTie
1998 Zeta 21.  12v
Neil
Permanent resident
**
Posts: 1316



« Reply #10 on: 24 August, 2015, 11:47:45 AM »

Tim, I think you are right, Fulvia always had radial tyres, but they would have been 82 series, today only 80 series tyres are generally available, which are marginally lower profile:  2Bar (~28psi) works well in my experience.
Logged

Neil   
386

1973 Fulvia S2 1.3
JohnMillham
Lapsed
Permanent resident
**
Posts: 1045



« Reply #11 on: 24 August, 2015, 01:40:49 PM »

Most likely due to side walls being lower profile on more modern tyres. So if running non standard lower profile tyres like I do I tend to go to 2bar.

Cant remember when Lancia stopped fitting crossplies but it must be pre Aprilia.
The first Michelin Xs were fitted to Aurelias, so well after the Aprilia. See Longstone Tyres website, where there's a bit of tyre history.
Regards, John
Logged
fay66
Permanent resident
**
Posts: 6232



« Reply #12 on: 24 August, 2015, 05:37:47 PM »

Tim, I think you are right, Fulvia always had radial tyres, but they would have been 82 series, today only 80 series tyres are generally available, which are marginally lower profile:  2Bar (~28psi) works well in my experience.

When I bought "Fay" she had what I believe was the original 155,14,x80 Michelin X's fitted, as she'd only done 27,000 miles with the original owner, and it looked like the spare had only been used lightly.

Brian
8227 Cool
Logged

Own 1966 Fulvia 2C Berlina since 1997, back on road 11-1999.Known as "Fay"
2006 Renault Megane 1 5 Dci Sports Tourer
Dedra Technical Adviser
davidwheeler
Permanent resident
**
Posts: 1485



« Reply #13 on: 25 August, 2015, 07:00:13 PM »

Agree, Aprilias were originally cross ply but Michelin X suited them very well.  Now universally on radials I suspect.  Agree also, 22 psi on my Fulvia means impossibly heavy steering with modern tyres.  Currently at 28 psi but tempted to go higher...
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
fay66
Permanent resident
**
Posts: 6232



« Reply #14 on: 25 August, 2015, 10:40:36 PM »

David,
The new Dunlop Street Response  i've just fitted to my 2c are very good once the wheels are moving, even very slowly, so I have no complaints
I run 28psi all round.

Brian
8227 Cool
Logged

Own 1966 Fulvia 2C Berlina since 1997, back on road 11-1999.Known as "Fay"
2006 Renault Megane 1 5 Dci Sports Tourer
Dedra Technical Adviser
Pages: [1] 2   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2021 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines
Page created in 0.057 seconds with 20 queries.