OEM Tires, Optional OEM tires, and totally off-the-wall tires

On 9/8/07 9:25 AM, in article 01c7f223$682b6500$9698c3d8@race, "*"
> wrote:

>
>
> E Meyer > wrote in article
> >...
>>
>>
>>
>> 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.
>>
>>
>
>
> "The Racing & High-Performance Tire" by Paul Haney
>
> ISBN 0-9646414-2-9
>
> Available through SAE - or directly from Haney at:
>
> http://www.insideracingtechnology.com/
>
>
> Page 70 and 71 "Load and Internal Pressure"
>
>

This looks like the reference I was seeking. Thanks.