Tyre Pressures

[Wizzo]

Hi all,

I have a Mistral SWB running on 245/70R 16 tyres on BK Racing alloys.

Have pressures set at 26 front 30 rear, however fronts seem to be wearing shoulders off indicating they are under pressure.

I have looked at several web sites but they seem only to quote standard pressures.

Any ideas ?

 

[Terranosaurus]

Have you had your tracking checked recently also does your truck sit level? If the torsion bars have sagged and its sitting nose down this can cause tyre wear.

 

[Wizzo]

Hi hummingbird,

Yeah had tracking checked because it does pull slightly to the ditch but was OK.

All sits level.

 

[(RIP) PLANK]

if it were me i would try 28 in the front and rear!

 

[rossco]

Check with your supplier for the correct tyre pressure for that model of tyre.
Otherwise try 30 like you rear if the rear is running ok.

 

[Toolmaker]

tyre wear.

like you i used to do the fronts to 26psi and found that the sides scrubbed out very quickly.
tracking is spot on by the way. found the best combination is 32 front 35 rear. this gives me even tyre wear.

 

[(RIP) PLANK]

be carefll of tyre suppliers! I had new tyres pn one of our Granbd Vitaras a few days ago OEm replacment Bridgestones, he inflated them ll to 38 PSI and told me this was ideal for this car and was the correct pressure, he was a little embarrased when i showed him the sticker in the door jamb saying 26 all round!

On our T2's with 235 75 15's i found 28 all round to work well

grand vitaras with 235 60 16's 26 all round works well. one with alloys one with steel

and we tow or load them heavily regularly, remember towing doesnt add much stress to the rear tyres as nose wights are only around 75 kilos at the most.

so bearing in mind your tyres are not such a different size to the two mentioned above, that is what i based my 28 PSI all round on!

 

[Terranosaurus]

Be careful going far fro factory settings this could leave you open to prosecution and invalid insurance in the event of an accident.

 

[(RIP) PLANK]

HB, you allways tell everybody this, and to and extent yes you are correct, hence may advice on taking heed of simmilar tyres on simmilar vehicles.

But come on, you dont even have the original tyres and wheels do you? so what difference do the manufacturers pressures mean when we are dealing with non standard tyres?

 

[Terranosaurus]

Theres no harm in warning people, they can then make an informed decision.

My tyres aren't that far from standard size its just they are imperial measurements not metric. Mine are 6mm wider and just over 1 inch taller, and I run them at factory settings (mostly, don't have any problems with uneven tyre wear, despite driving the wheels off it most of the time.

 

[(RIP) PLANK]

Hb not wishing to be argumentative but how can you ruun them at factory settings? there are none! The Nissan/ford settings are for standard tyres and in any other size therefore makes this info obselete?


I agree making people aware is good, but where non standard wheels and tyres are used the factory settings 'as i said' dont mean anything.

i tend to go for the middle of the raod between the factory loaded and unloaded settings when there is a choice. On commercials i tend to go for the top end of the recomendations for better performance under load, and on a 4x4 lower down the range for better grip.

To high pressure in the rear, (i think 35 psi was siggested) will surely make the back end a bit bouncy and lively in the wet? especialy when only the driver is in the car. Not tm mention poor off road ability.

it is also worth remembering a T2 has a good load carrying capacity, so a small trailer and/or the weeks shopping does not constitute fully loaded!

Some people advocate extra pressure in the rear for caravan towing, again, there is not much nose weight, and from experience i have found the caravan is more stable with a lower rear tyre pressure, that goes for the caravan tyres too! beware of over inflation of the rears it improves nothing!

think of it like this, the wieht of the engine is over the front, and that is heavier than virtualy anything you will put in the back!

anyway HB its about time we had a bit of a 'disagreement' people will be thinking we have started to get along :lol: :lol: :wink:

 

[andian61]

Tyre pressures

Hi my first time adding a comment on this site but have to take issue about tyre pressures and having more weight in the front due to engine and such. I always took it that whichever the driver wheels are then these are the ones that require a little extra inflation compared to the non driving ones. This is the same on all cars and must apply to a certain extent to Terrano's seein as they are used on the road a majority of the time (majority of the time two wheel drive). Another factor that must be remembered is the greater over hang at the back of the vehicle exerting more pressure relative to weight applied both in passengers, other loads in the rear and towing. I would suggest that great care must be taken over underinflation as with over inflating as both could prove to be extremely dangerous. Does anyone stop intermittently on long trips to feel their tyres and see how hot they are? I am not afraid to admit this.

 

[robobone]

i must agree with plank on this to a certain degree but have i have never heard of anyone being procecuted for incorrect tyre pressure
esp when warm tyres tend to be more pressure than cold ones surley a car stopped by police would depending on how longi ts been travling the tyre pressure would varysome what

if i am wrong i stand corrected

 

[rossco]

Gee a policeman with a tyre gauge come on, they wouldn't even know what tyre pressure they had in there vehicle.

I would still go with the manufacture of the tyre recommendations, as they design test and manufacture tyres and know what the best footprint is.

The door sticker is only valid for that original brand and size tyre supplied to the vehicle at manufacturing time.

Most people change brands or size of tyres, so this would negates the door sticker.

 

[Terranosaurus]

I just sold 20 digital pressure and tread depth guages to South Yorkshire Police, part of an on going purchase.

 

[robobone]

I just sold 20 digital pressure and tread depth guages to South Yorkshire Police, part of an on going purchase.

snitch :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:

 

[rossco]

Did you tell them how to use them and not to go around using them as a breathalysers.

Evening sir, please blow into this digital breathalyser.

:lol: :lol: :lol: :lol: :lol:

 

[johnston_evo3]

another way check for right pressure is to buy a infra red temp guage run the car and see if edges heat more than inside or visa versa..

although variations across the tyre can be caused by your tracking being out 2

 

[JonathanM]

HB has a point about tyre pressures and the police, but the time that they would check them is after any incident where incoorect inflation could have contributed - so it is more of an acident investigation issue.

As far as towing, certainly for caravan tyres incorrect inflation (usuallu under inflation) has been shown to have a link with sudden deflation/blow out issues, so I wouldn't depart from a manufacturers pressure. I personally have always found that when towing with the T2 the whole outfit is more stable with the "loaded" tyre pressures, whether the tyres are 235/75 15's or 235/70 16's. Running with 90kg noseweight might mean I need to do this, rather than a lesser loading.

 

[MistralMac]

There seems to be no definitive answer then to this argument - with various viewpoints and pressure recommendations.

Could we not get a representative of the club to approach the Nissan 'experts' and ask them for their view and reasonings also?

MM.