Defective Michelin Tires
Not strictly tow vehicle related but thought you tire gurus may be interested in this. I just put a set of Michelin’s new Premier all-season tires on DW's Magnum. These are the tires they are advert...
Forum Discussion
Tires do need to 'break in' or 'cure' before they settle in. More so
these days with whatever compounding/formulation they now use
So the tire tech may have had a tire within spec. The second balancing
should have had those tires broken in, or a maybe needed some more
time on the pavement
Ask the dealer to find out where those tires were made. Could also be
just a batch/lot issue. ISO9000 is part of that forensics and why so
key to where they are made. China does (both) not understand and those
that do, don't care or are forbidden to do anything about it...for now
Another potential is that 'dove tail' groove...I'd not own anything with
that design. Totally counter to my intuition
Stability of the tread blocks would be my concern. There are patents
on how MS/AT tires manage tread block wiggle during high force maneuvers
One has tapered from the bottom of the groove up to the pavement end.
Another to get around that patent, has stepped taper. That was argued
and lost because the OEM's engineers & lawyers verbiage left that
door open
With a wider groove at the base, can see the whole tread block wiggle
during high stress maneuvers. Not a good thing...even wacky to me. You
can check by looking at the tread block edges between the grooves. Look
for tread block folding over to cleave the edges (the would be rounded
or smoothed...maybe feathered...instead of a squared edge)
Ask if sweetie drove over a curb, or some such at high speed.
Ask if that dealership understands the sidewall dots in reference to
mounting positioning and balance? There should be two. IIRC, main
is yellow and secondary is red. They indicate where the valve stem
should be aligned to them.
If it takes too much weight using the yellow, then unmount to move
the red in line.
If neither works, then demount and rotate it 90*.
If that doesn't work, defective and return to the factory
Final possibility is that these tires were at the 'bottom' of the
stack during shipment. I've unloaded lots and a few times found that
bottom tire flattened and those could never be balanced right
Reaffirms my opinion that Michelin is no longer the company I used to
love. Something has changed and betcha upper/middle management no
longer manage their product, but only their bottom line. Bean counter
management at it's best and see all too often...
these days with whatever compounding/formulation they now use
So the tire tech may have had a tire within spec. The second balancing
should have had those tires broken in, or a maybe needed some more
time on the pavement
Ask the dealer to find out where those tires were made. Could also be
just a batch/lot issue. ISO9000 is part of that forensics and why so
key to where they are made. China does (both) not understand and those
that do, don't care or are forbidden to do anything about it...for now
Another potential is that 'dove tail' groove...I'd not own anything with
that design. Totally counter to my intuition
Stability of the tread blocks would be my concern. There are patents
on how MS/AT tires manage tread block wiggle during high force maneuvers
One has tapered from the bottom of the groove up to the pavement end.
Another to get around that patent, has stepped taper. That was argued
and lost because the OEM's engineers & lawyers verbiage left that
door open
With a wider groove at the base, can see the whole tread block wiggle
during high stress maneuvers. Not a good thing...even wacky to me. You
can check by looking at the tread block edges between the grooves. Look
for tread block folding over to cleave the edges (the would be rounded
or smoothed...maybe feathered...instead of a squared edge)
Ask if sweetie drove over a curb, or some such at high speed.
Ask if that dealership understands the sidewall dots in reference to
mounting positioning and balance? There should be two. IIRC, main
is yellow and secondary is red. They indicate where the valve stem
should be aligned to them.
If it takes too much weight using the yellow, then unmount to move
the red in line.
If neither works, then demount and rotate it 90*.
If that doesn't work, defective and return to the factory
Final possibility is that these tires were at the 'bottom' of the
stack during shipment. I've unloaded lots and a few times found that
bottom tire flattened and those could never be balanced right
Reaffirms my opinion that Michelin is no longer the company I used to
love. Something has changed and betcha upper/middle management no
longer manage their product, but only their bottom line. Bean counter
management at it's best and see all too often...
