Tyre Pressures

[Trophy Blue Tourer]

Originally Posted by COLVERT

And all the time I thought PASCALS were type of French sweet. !!! Lol.

Nope!!

I think you may mean RASCALS ??

As in the way lots of us englishmen think of most of the french!!

As in " OH those little RASCALS"

Of course if they were gay I suppose then I suppose they could be a type of happy french sweet??



Andy!!

[bl52krz]

Think i will be sticking to pounds a square inch thanks.

[Fluffle-Valve]

Originally Posted by Jakg

Tyre pressures from the ZT manual (looks to be the same for the 75, too):

I've just gone off this chart and put 32 psi all round in my 2002, 75 Tourer, fitted with 215/55x16 winter tyres.
I've just taken the summer tyres off and binned them as they were really old and cracking. They all had worn on the edges of the tread because I have been running them at 24psi for years. I'm hoping now that the winters will wear evenly?

[COLVERT]

Originally Posted by Fluffle-Valve

I've just gone off this chart and put 32 psi all round in my 2002, 75 Tourer, fitted with 215/55x16 winter tyres.
I've just taken the summer tyres off and binned them as they were really old and cracking. They all had worn on the edges of the tread because I have been running them at 24psi for years. I'm hoping now that the winters will wear evenly?

24 psi.-------It's a wonder you didn't roll them off the rims.

No fast cornering for you then. What do you run your lorry at ???---


PS. In your Blog you use the word REALISED to the public a couple of times. Do you mean RELEASED to the public ???

[torque2me]

I think my handbook for a v8 saloon states 34 front and 36 rear (or very close to that!

Kev

[MacRob]

The manual that came with the car gives the correct MANUFACTURES recommended tyre pressures and these are the pressures you should use. It is as simple as that. Any higher and your steering becomes light as less tyre on the surface of the road coursing more tyre wear to the centre of the tyre. Any less and it becomes heavy as more tyre is on the surface of the road coursing more wear to the sides of the tyre. BOTH also effect the speedo, fuel economy and braking.

[COLVERT]

Originally Posted by MacRob

The manual that came with the car gives the correct MANUFACTURERS recommended tyre pressures and these are the pressures you should use. It is as simple as that. Any higher and your steering becomes light as less tyre on the surface of the road causing more tyre wear to the centre of the tyre. Any less and it becomes heavy as more tyre is on the surface of the road causing more wear to the sides of the tyre. BOTH also effect the speedo, fuel economy and braking.

I guess you mean outside edges to the tread rather than the sides of the tyre. However under inflation does cause more wear to the tyre sidewalls as they flex.

Generally a pound or two either way does not seem to have much effect. In the real world, however, I'm willing to bet that very few tyres are regularly checked and are running at the optimal pressures.--

Folk have a tendency to put some air in them when they notice, by accident, that the tyre looks a little flat.---

A few tyre manufacturers say what they think the tyre pressure should be for their tyres.

Some folk have even been known to say---The pressures not too bad as it's only flat at the bottom.--

[roverbeast75]

Originally Posted by Jakg

Auto Data won't be independently testing tyre pressures (nobody will be, to be honest). Any other suggestions are probably a typo (or an individual owners experience).

Tyre pressures from the ZT manual (looks to be the same for the 75, too):

Why does it give a different PSI for the 2.0 diesel and CDTI ? Aren't the CDT and CDTI identical apart from an engine remap? (for speeds above 100 mph - 160 km/h)

[MacRob]

Originally Posted by roverbeast75

Why does it give a different PSI for the 2.0 diesel and CDTI ? Aren't the CDT and CDTI identical apart from an engine remap? (for speeds above 100 mph - 160 km/h)

The curb weight of the CDT is 1485Kgs. The curb weight of the CDTi is 1585kgs. For some reason in gained 100kgs

[HarryM1BYT]

Originally Posted by MacRob

The curb weight of the CDT is 1485Kgs. The curb weight of the CDTi is 1585kgs. For some reason in gained 100kgs

Yet despite the extra weight, it quotes lower pressures (by 2psi) at the rear.

I use a different TP table, which mentions various tyre sizes and associated variations in pressure.