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Old September 8th 07, 01:20 AM posted to alt.autos.toyota,rec.autos.tech
Hachiroku $B%O%A%m%/(B
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Posts: 616
Default OEM Tires, Optional OEM tires, and totally off-the-wall tires

On Fri, 07 Sep 2007 23:13:59 +0000, E Meyer wrote:

>
>
>
> On 9/7/07 8:55 AM, in article 01c7f156$151493a0$f192c3d8@race, "*"
> > wrote:
>
>
>>
>> Hachiroku $B%O%A%m%/ wrote in article
>> <HP2Ei.16866$453.2177@trndny02>...
>>> On Thu, 06 Sep 2007 08:32:34 -0500, * wrote:
>>>
>>>>> I make sure they fit the rims correctly.
>>>>
>>>> With today's tire and rim technology, how can a 14" tire fit a 14" rim
>>>> incorrectly?
>>>
>>>
>>> And you're telling me you're an 'expert?!?!?!
>>>
>>>
>>>
>>> Toyo Proxes T1r
>>> 195/45R14
>>> 15Lbs.
>>> 280 Treadwear
>>> MP
>>> V Rated
>>> Tread Depth 10
>>> Rim Width (Min/Max) 6 - 7.5
>>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>>
>>>
>>>
>>>
>>> Toyo Proxes Tpt
>>> 185/60R14
>>> 16Lbs.
>>> Rim Width (Min/Max) 5 - 6.5
>>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>>
>>>
>>>
>>> If you tried to put the first tire on the rim meant for the second
>>> tire, the sidewall would blowout. A real recipe for disaster.
>>>
>>> If you don't know this, then NO WAY are you telling me what to do with
>>> my tires!!!
>>>
>>> So, on my Corolla with OEM rims of 5.5", I had to take a set of wheels

>> off
>>> my Celica (6.5") to run the hi-poi 195/45-14s or run the risk of the
>>> sidewall flexing too much and blowing the tire off the rim...
>>>
>>>
>>>
>>>

>>
>>
>> In spite of all your horse schidt, here is one undeniable fact......
>>
>>
>> A tire supporting a 500 pound load will have a footprint of 20
>> square-inches at an inflation pressure of 25 p.s.i. and a footprint of
>> 12.5 square-inches at 40 p.s.i. inflation. That's simple high school
>> math and physics.
>>
>> The ONLY differences between the footprints of a "narrow" tire versus a
>> "wide" tire is the SHAPE of the footprint. They BOTH require the
>> same-sized footprint to support the same load at the same inflation
>> pressures.
>>
>> With the 20 square-inch example, a ten-inch-wide tread will have a
>> footprint that is ten-inches wide by two-inches long while a five-inch
>> tread would have a footprint that is five-inches wide by four-inches
>> long.
>>
>> With 25 pounds of air pressure, you need 20 square-inches to support 500
>> pounds.....one way or another.
>>
>> By running your tires at maximum inflation, you are running the car at
>> 62.5 percent of the tire footprint that the car manufacturer has
>> designed the suspension to work with.
>>
>>
>>
>>

> Undeniable fact?? Usually the stuff you put out is more or less correct
> (bravado and SOB-ness not withstanding), but I need to see a legit
> reference for this one.



I also want to see what's Horse Schidt about a manufacturer's
recommendation for rim widths.

I'll take their word first...


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