[Yves M.]

Hi,

Be carrefull with a lower PSI in front at highway speeds:

I would expect the car to behave badly in wells on the road or with a side wind. You could jump from one line to an other one on a highway without controling it.
Just like having radial tires in front and conventionnal in the back: Very dangerous (experienced many years back). The front will seem to go left and right while the back keeping steady e.g. for your example 35 front and 44 back

The reason for the lower rear pressure is for lower weight on them and to keep the contact area to the right shape. Along with comfort (no rear wheel travel)

 

[Yves M.]

Hi,

In the case of having a differential of almost 10 psi between the front and back, it is not slippping that I find dangerous but the fact that the sole of the tire and the metal rim can be in different planes.
The belt (tread) would stay at the same place on the road but the rim would move relative to the tire tread.

Rim moving left and right into the none moving tire in front but much less in the rear tires. The differential of looseness is the unpredictable effect

This would not happen with the higher pressure tire, not as much. And having the wheels that control direction doing that is hazardous on other that flat road and no wind.

The recommanded tire pressure is 38 in the front tires and 35 in the back tires. Hope I was clearer.

 

[Yves M.]

Hi Figgy,

Sorry that I had a hard time to explain. I do a better job in French which is my first language.

The simplest way I could retry to explain my previous post would be to use the extremes:
Difference between a "conventional" tire and a "radial" tire is the internal structure ...

The conventional is stiffer. When you turn the steering wheel (read turn the rim angle to the car), the tire belt under the tread will turn at the same time

The Radial tire is not as stiff. When you turn the steering wheel (therefore the rim into the wheel) the tire belt under the effort will turn (left-right) with a lag (compared to the conventional tire).
Meaning that the rim can go in a particular direction and the tire tread in not exactly the same direction

This applies similarely to having tires in the front with a big differential of pressure to the tires in the back. Your low psi front tires would make a situation like you are running radial in front and conventional in the back

Best thing like you wrote is to try it out, just be carefull.