"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
> I was wondering if the 245/70R16 sizes cause any probs
> with speedometer or front turning clearance under the cowling
> or any other considerations on going from the 75 to the 70 ?
> It seems like the overall outside tire diameter is the same, but ??
>
One last nagging question on the slight sizing difference -
What about the full size spare I have - 225/75R16 -
Any major concerns on running 3 tires of the alt size - 245/70R16
along with the spare that is 225/75R16 -

The diameters calc out to a difference of .216"
225/75R16 = 29.287
245/70R16 = 29.503

 

"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
> I was wondering if the 245/70R16 sizes cause any probs
> with speedometer or front turning clearance under the cowling
> or any other considerations on going from the 75 to the 70 ?
> It seems like the overall outside tire diameter is the same, but ??
>
One last nagging question on the slight sizing difference -
What about the full size spare I have - 225/75R16 -
Any major concerns on running 3 tires of the alt size - 245/70R16
along with the spare that is 225/75R16 -

The diameters calc out to a difference of .216"
225/75R16 = 29.287
245/70R16 = 29.503

 

"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
> I was wondering if the 245/70R16 sizes cause any probs
> with speedometer or front turning clearance under the cowling
> or any other considerations on going from the 75 to the 70 ?
> It seems like the overall outside tire diameter is the same, but ??
>
One last nagging question on the slight sizing difference -
What about the full size spare I have - 225/75R16 -
Any major concerns on running 3 tires of the alt size - 245/70R16
along with the spare that is 225/75R16 -

The diameters calc out to a difference of .216"
225/75R16 = 29.287
245/70R16 = 29.503

 

For emergency use it will be fine.

If you intend to buy 3 new tires and use the Wrangler ST as the 4th you need
to buy 3 more Wrangler STs.

You don't want to mix tires of vastly different qualities
--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Brilliant Black Crystal Pearl Coat
Sharing is why we are all here....... or should be.
..
"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:fqgVe.173$jS.152@newssvr30.news.prodigy.com.. .
>
> "Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
> news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
>> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
>> I was wondering if the 245/70R16 sizes cause any probs
>> with speedometer or front turning clearance under the cowling
>> or any other considerations on going from the 75 to the 70 ?
>> It seems like the overall outside tire diameter is the same, but ??
>>
> One last nagging question on the slight sizing difference -
> What about the full size spare I have - 225/75R16 -
> Any major concerns on running 3 tires of the alt size - 245/70R16
> along with the spare that is 225/75R16 -
>
> The diameters calc out to a difference of .216"
> 225/75R16 = 29.287
> 245/70R16 = 29.503
>
>
>

 

For emergency use it will be fine.

If you intend to buy 3 new tires and use the Wrangler ST as the 4th you need
to buy 3 more Wrangler STs.

You don't want to mix tires of vastly different qualities
--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Brilliant Black Crystal Pearl Coat
Sharing is why we are all here....... or should be.
..
"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:fqgVe.173$jS.152@newssvr30.news.prodigy.com.. .
>
> "Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
> news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
>> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
>> I was wondering if the 245/70R16 sizes cause any probs
>> with speedometer or front turning clearance under the cowling
>> or any other considerations on going from the 75 to the 70 ?
>> It seems like the overall outside tire diameter is the same, but ??
>>
> One last nagging question on the slight sizing difference -
> What about the full size spare I have - 225/75R16 -
> Any major concerns on running 3 tires of the alt size - 245/70R16
> along with the spare that is 225/75R16 -
>
> The diameters calc out to a difference of .216"
> 225/75R16 = 29.287
> 245/70R16 = 29.503
>
>
>

 

For emergency use it will be fine.

If you intend to buy 3 new tires and use the Wrangler ST as the 4th you need
to buy 3 more Wrangler STs.

You don't want to mix tires of vastly different qualities
--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Brilliant Black Crystal Pearl Coat
Sharing is why we are all here....... or should be.
..
"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:fqgVe.173$jS.152@newssvr30.news.prodigy.com.. .
>
> "Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
> news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
>> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
>> I was wondering if the 245/70R16 sizes cause any probs
>> with speedometer or front turning clearance under the cowling
>> or any other considerations on going from the 75 to the 70 ?
>> It seems like the overall outside tire diameter is the same, but ??
>>
> One last nagging question on the slight sizing difference -
> What about the full size spare I have - 225/75R16 -
> Any major concerns on running 3 tires of the alt size - 245/70R16
> along with the spare that is 225/75R16 -
>
> The diameters calc out to a difference of .216"
> 225/75R16 = 29.287
> 245/70R16 = 29.503
>
>
>

 

For emergency use it will be fine.

If you intend to buy 3 new tires and use the Wrangler ST as the 4th you need
to buy 3 more Wrangler STs.

You don't want to mix tires of vastly different qualities
--
..
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Brilliant Black Crystal Pearl Coat
Sharing is why we are all here....... or should be.
..
"Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
news:fqgVe.173$jS.152@newssvr30.news.prodigy.com.. .
>
> "Phil Schuman" <pschuman_NO_SPAM_ME@interserv.com> wrote in message
> news:3VMTe.684$au2.349@newssvr17.news.prodigy.com. ..
>> The Grand Cherokee OE tires are the Wrangler ST with 225/75R16 -
>> I was wondering if the 245/70R16 sizes cause any probs
>> with speedometer or front turning clearance under the cowling
>> or any other considerations on going from the 75 to the 70 ?
>> It seems like the overall outside tire diameter is the same, but ??
>>
> One last nagging question on the slight sizing difference -
> What about the full size spare I have - 225/75R16 -
> Any major concerns on running 3 tires of the alt size - 245/70R16
> along with the spare that is 225/75R16 -
>
> The diameters calc out to a difference of .216"
> 225/75R16 = 29.287
> 245/70R16 = 29.503
>
>
>

 

"Lon" <lon.stowell@comcast.net> wrote in message
news:avOdnXMwWLiG1b_eRVn-iA@comcast.com...
>J Strickland proclaimed:
>> Not if the change was from 225 to 235. These numbers represent the tread
>> width in mm, and 10mm is the functional equivelent of 3/8".
>>
>> Now, there is some misunderstanding (at least on my part) of just exactly
>> where they measure 225 or 235, and the actual tread blocks being square
>> on one tire and rounded off on the other might play a role in your
>> perception of an inch difference, but the actual difference is 10mm. Your
>> point being that you are looking at the tread patch on the ground is not
>> lost on me ...
>>
> The 225/235 is the sectional width, not the tread width. And now that
> you mention it, I can't remember where they measure it either... and
> the actual size is always rounded off anyway. Unless the tires
> involved have exactly the same tread compounds and patterns,
> comparing traction based on section [or tread] width is a waste of
> time, as it really depends more on the pattern and compounds.


Agreed, especially when the discussion is the difference in 225 and 235.

There can easily be other factors when the difference is, as Mike points
out, a 11.50 and a 9.50, or whatever. But the OP asked about the differences
in the performance of a 225 vs. a 235, and I don't think he will notice
much, if anything, unless he also changes the tread pattern and/or rubber
compound.

 

"Lon" <lon.stowell@comcast.net> wrote in message
news:avOdnXMwWLiG1b_eRVn-iA@comcast.com...
>J Strickland proclaimed:
>> Not if the change was from 225 to 235. These numbers represent the tread
>> width in mm, and 10mm is the functional equivelent of 3/8".
>>
>> Now, there is some misunderstanding (at least on my part) of just exactly
>> where they measure 225 or 235, and the actual tread blocks being square
>> on one tire and rounded off on the other might play a role in your
>> perception of an inch difference, but the actual difference is 10mm. Your
>> point being that you are looking at the tread patch on the ground is not
>> lost on me ...
>>
> The 225/235 is the sectional width, not the tread width. And now that
> you mention it, I can't remember where they measure it either... and
> the actual size is always rounded off anyway. Unless the tires
> involved have exactly the same tread compounds and patterns,
> comparing traction based on section [or tread] width is a waste of
> time, as it really depends more on the pattern and compounds.


Agreed, especially when the discussion is the difference in 225 and 235.

There can easily be other factors when the difference is, as Mike points
out, a 11.50 and a 9.50, or whatever. But the OP asked about the differences
in the performance of a 225 vs. a 235, and I don't think he will notice
much, if anything, unless he also changes the tread pattern and/or rubber
compound.

 

"Lon" <lon.stowell@comcast.net> wrote in message
news:avOdnXMwWLiG1b_eRVn-iA@comcast.com...
>J Strickland proclaimed:
>> Not if the change was from 225 to 235. These numbers represent the tread
>> width in mm, and 10mm is the functional equivelent of 3/8".
>>
>> Now, there is some misunderstanding (at least on my part) of just exactly
>> where they measure 225 or 235, and the actual tread blocks being square
>> on one tire and rounded off on the other might play a role in your
>> perception of an inch difference, but the actual difference is 10mm. Your
>> point being that you are looking at the tread patch on the ground is not
>> lost on me ...
>>
> The 225/235 is the sectional width, not the tread width. And now that
> you mention it, I can't remember where they measure it either... and
> the actual size is always rounded off anyway. Unless the tires
> involved have exactly the same tread compounds and patterns,
> comparing traction based on section [or tread] width is a waste of
> time, as it really depends more on the pattern and compounds.


Agreed, especially when the discussion is the difference in 225 and 235.

There can easily be other factors when the difference is, as Mike points
out, a 11.50 and a 9.50, or whatever. But the OP asked about the differences
in the performance of a 225 vs. a 235, and I don't think he will notice
much, if anything, unless he also changes the tread pattern and/or rubber
compound.