13/60 TYRE PRESSURE

[DC6789]

NEW MEMBER SO APOLOGIES AS THIS TOPIC PROBABLY ALREADY COVERED.
ADVICE PLEASE ON TYRE PRESSURE FOR RADIALS 155/80/R/13
THANKS

[rubberhead]

I would go for 28 front 30 rear. :) to hard and they bounce all over the place and the center of your tread will wear out quite quickly,to soft and the outer edges will go and it will be heavy on the steering

[JohnD]

Good starting point
Invest in a tyre tread depth gauge and keep a note of the depth every month.
It'll soon show if you need to adjust the pressure.

John

[trojan]

got a set of 5j minilights what size of tyre and pressure would you think would suit it best, have a set of 155x 80 in good condition but think they might be not wide enough,  sorry to wander off and hijack this thread

[garyf]

I run 28 front 30 rear on my Vitesse but with 175/70 tyres fitted, it seems to drive ok, with reasonable ride comfort and the steering not to heavy. (The Vitesse Handbook however states 24 Front and 26 Rear for the standard 155/80 tyres on the Mk2 Vitesse?)

I suspect the front pressure should be less on a herald with the lighter engine, say 22 front 24 rear if only one person in the Car, but this may have been the recommended pressures for crossply tyres :-/?  

[ferny]

That is the crossply setting. It's also what I use in my Herald on radials. No uneven wear from incorrect pressures.

[GrayFox]

eighteen front twenty six back or when fully laden twenty two front and twenty eight back its all in the workshop manuel

[ferny]

You sure, that sounds out by a long way!

[Goody]

I have allways found pressure is more a matter of choice than what anyone or book recommends.   On my Heralds I run 28lbs front and rear.  My Dolomite 30 front and rear.   I have also found no single figure is good for every brand and or tread design.  One must experiment with different pressures to find what they like in handling and wear.  28 to 30 is a good starting point.  If you only go with ride, that might not be best for handling and wear.   When radials first came out, they recommended lower pressure, NOT SO in my book as lower meant bad handling and quick wear out.  On some cars lower pressure causes sidewalls to flex too much. Here in the states tires have weight ratings while this should not be a problem with Triumph's a under rated tire will cause problems.  The above is for normal driving, race, off road and the like are a different matter.

NOTE: not all pressure gauge's and pump's are Equal!  Invest in a good gauge and refrain from using more than one at a time on each wheel.

[junkuser]

Very sound advise Bill.

[Scimher]

I run my 1200 converible on 5j Spitfire/Dolomite rims at 27psi front & 30 rear.....(on the basis that the original handbook gave the front tyres as 3psi less than the rear...) No undue wear......