"Xeno" wrote in message
...
On 15/6/19 4:16 pm, Rod Speed wrote:


"Xeno" wrote in message
...
On 15/6/19 11:39 am, Rod Speed wrote:


"Xeno" wrote in message
...
On 15/6/19 7:04 am, Clare Snyder wrote:
On Fri, 14 Jun 2019 15:05:56 -0400, Tekkie®
wrote:

Arlen G. Holder posted for all of us...



I have two more tires to put on for her for her rears, which are
worn more
evenly (she probably doesn't rotate?) so I told her to wait until
she
needed them since they are just sitting outside (I moved them into
the
garage as they were getting dirty in the rain over the winter).


The better tires should-by tire manufacturers recommendation-be
mounted on
the back.
That is only true for ONE risk - the risk of the rear tires
breaking
away on a corner due to hydroplaning or poor traction.

In his case if he always put the best tires on the rear he would
continually be putting half worn tires on the axle that is eating
tires and requires the most traction (the downhill steering wheels
and
the uphill "scrambling" wheels.

Doesn't make a LICK of sense in either case.

The best tyres to the rear is for handling, keep the oversteer under
control. In that case, we're referring to the best *type* of tyre.
Radial versus crossply or steel belted radial versus textile radial.
Most run steel radials now so the basic premise is academic but the
basic rule is the best handling tyre when mixing tyre types.
When it comes to tread depth, yes, you are dealing then with the risk
of aquaplaning. More weight on the front means better water removal
even on lower tread depths. At the rear, on a FWD, there may be very
minimal mass on the rear tyres so pushing through water may be more
difficult.
In summary, the best place for the newest tyres on a FWD is the rear.

otoh you dont see a fwd aquaplane much at all even with the tires
with the least tread on the rear wheels.

It is the manufacturers who are recommending newest to the rears.

But given that I dont see any aquaplaning with the rear wheels on my
FWD,
I dont buy their recommendation. Clare's comment covers that well.

I understand their logic since I also understand the handling dynamics
of a car.

Not with aquaplaning on the rear wheels of FWD cars you dont.

Did I not say that it isn't just for *aquaplaning*?

The other effects are even less likely.

The idea is to reduce slip angles at the rear to control oversteer
tendencies.

Oversteer just isnt a problem with fwd cars.

This is all the time, not just when aquaplaning. All cars are designed
with inbuilt understeer - even rear wheel drive cars.

fwd cars understeer regardless of the design.

If you want to argue the toss, then take it up with the tyre
manufacturers.

My tire manufacture isnt stupid enough to say that.

After all, it's their recommendation for their own product

It isnt with mine.

so I feel safe in assuming they would have a better idea than Joe Blow off
the street.

Its basic physics and trivial to prove that the
car doesnt do any better with the new tires
on the back with a fwd car.