Broken Cord on Michelin Tire

[Pete Masterson]

I can't say for sure about max inflation. I know that when tires
'bottom out' and hit a very hard edge (like the edge of a large pot
hole or a transition between gravel and pavement) that damage is
likely to occur. Going over curbs, too, can damage tires, especially
if the side wall is highly distorted during the incident.

I'd have to ask a tire engineer about the relative merits of
inflation -- on one hand, it would seem like fully inflated tires are
less likely to crush to the wheel rim, possibly protecting the tire
from pinching damage, but the high pressure would also place the tire
under tension pressure ... so???

Any tire engineers out there?

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
aeonix1@...
On the road at Idaho Springs, CO



On Sep 8, 2008, at 11:26 AM, David Brady wrote:

> Are highly inflated tires more prone to these failures? The recall
> for the 450LXi specifies running tires at 130 psi. If the tire is at
> max inflation then it is less able to deflect to road discontinuities.
> Seems like you'll likely have more "broken belt" issues at max
> inflation???
>
> David Brady
> '02 LXi, NV
>
> Pete Masterson wrote:
>>
>> I agree that the 'broken belt' thing is likely a result of a road
>> hazard. While I haven't had any problems with my Toyo tires on my
>> coach, over the years, I've had a several tires on my automobile(s)
>> ruined by construction -- Indeed, a few years ago, when BART was
>> being built in the SF Bay Area, I lost several tires due to hitting
>> pavement from a gravel stretch where a subway was being built using
>> the cut-and-cover method. While I certainly tried to drive carefully
>> through the extensive construction zones, at night there were times
>> you just didn't see a transition until you hit it with that sickening
>> thud. Often the tires don't actually display any problems until days
>> (or weeks) after the damaging event. The damage occurs, then the
>> flexing of the tire causes the damage to spread until the tire-cord
>> is compromised.
>>
>> Michelin makes generally good, tough tires. It's always possible that
>> a manufacturing defect was involved, but it's unlikely. More likely
>> there was a road hazard event that let to the failure. In that case,
>> most tire companies don't cover the damage (but some companies may
>> cover road hazard damage), so you'll need to enquire with a Michelin
>> dealer.
>>
>> Pete Masterson
>> '95 Blue Bird Wanderlodge WBDA 42
>> aeonix1@mac. com
>> On the road at Idaho Springs, CO
>>
>> On Sep 8, 2008, at 10:21 AM, Gregory OConnor wrote:
>>
>>> you guys should find a trucker or trucking company to buy your tires
>>> prior to 3 or 4 years of age. rotating out a set every year or so
>>> will put new one on the front of your bus and run the tread off the
>>> used tires. its a green thing to do because the tread will be
>>> used up
>>> and the casing will be good for a retread. Tire Jobbers, can set you
>>> up with good credit for rotating out your used tires. I screw cords
>>> up jumping curbs and potholes, kinda doubt it is a Mfg prorate
>>> thing.
>>>
>>> GregO'Connor
>>> 94ptRomolandCa
>>>
>>> --- In WanderlodgeForum@ yahoogroups. com
>> , "Ross"
>>
>>> wrote:
>>>>
>>>> Hi,
>>>> Just a note about reporting the "failure". The request by the NHTSA
>>>> (national highway traffic safety assoc.) is for all failures, not
>>> just
>>>> blow-outs. In the requested information, there is a line
>>>> "Nature of the reported failure (slow leak,blow-out, worn etc)"
>>> This
>>>> can be important for the safety of all BlueBirds and all RV's
>>>> (especially those using 315 tires)
>>>> Ross
>>>> 2006 450 LXi
>>>> Here is the information:
>>>>
>>> http://nhthqnwws112 .odi.nhtsa. dot.gov/acms/ docservlet/
>> Artemis/Public/ P
>> <http://nhthqnwws112.odi.nhtsa.dot.gov/ac...t/Artemis/
>> Public/P>
>>> ursuits/2008/ RQ/INIM-RQ08004- 29624.pdf
>>>>
>>>> --- In WanderlodgeForum@ yahoogroups. com
>> , "Randy Merrill"
>>>> wrote:
>>>>>
>>>>> Hi Everyone,
>>>>>
>>>>> The left front tire on my coach has a broken cord. The tread is
>>> uneven.
>>>>> I am getting the tire replaced next week before I head out on a
>>> 1,500
>>>>> mile trip. The tire only has 27,000 miles on it. Does anyone know
>>> if
>>>>> Michelin has a warranty on tires? Has anyone else had a problem
>>> with
>>>>> cord breakage on Michelins?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Randy Merrill
>>>>> 2003 40'
>>>>> Ocala, FL
>>>>>
>>>>
>>>
>>>
>>
>>
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