I will second that. We lost a 'lot' of traction when we went from a 225
to a 235 while keeping the same profile even. Going to a wider 70
series adds to the loss.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bowgus wrote:
>
> A consideration ... if you drive in snow, and will be using the 245s they
> may be too wide. I say this because the 235 is too wide for my XJ in snow
> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
> tires ... which unfortunately are due for replacement this coming winter :-(
>
> "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 ??
> >
> >
> >

 

I will second that. We lost a 'lot' of traction when we went from a 225
to a 235 while keeping the same profile even. Going to a wider 70
series adds to the loss.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bowgus wrote:
>
> A consideration ... if you drive in snow, and will be using the 245s they
> may be too wide. I say this because the 235 is too wide for my XJ in snow
> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
> tires ... which unfortunately are due for replacement this coming winter :-(
>
> "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 ??
> >
> >
> >

 

I will second that. We lost a 'lot' of traction when we went from a 225
to a 235 while keeping the same profile even. Going to a wider 70
series adds to the loss.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Bowgus wrote:
>
> A consideration ... if you drive in snow, and will be using the 245s they
> may be too wide. I say this because the 235 is too wide for my XJ in snow
> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
> tires ... which unfortunately are due for replacement this coming winter :-(
>
> "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 ??
> >
> >
> >

 

There will be no difference (OK, the difference will be very small).

The 245 is 20mm wider, that's 10mm off of center, which is about 3/8". This
should pose no particular problem for clearance inside the fenders.

The 70 or 75 represent a diameter change (larger in your case) of 0.4
inches. This will not present any problems for the speedometer or the
gearing. Indeed, your speedometer is about 3 mph fast at 80mph right now,
and will be about 2 mph fast with the larger tires. You will be fine.

The caluclation is
<width -- 225> * <aspect ratio -- 75%> * 2 / 25.4 + <rim -- 16> = overall
diameter. (you multiply by 2 to get the total sidewall height, and divide by
25.4 to convert from mm to inches.)





"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 ??
>
>
>

 

There will be no difference (OK, the difference will be very small).

The 245 is 20mm wider, that's 10mm off of center, which is about 3/8". This
should pose no particular problem for clearance inside the fenders.

The 70 or 75 represent a diameter change (larger in your case) of 0.4
inches. This will not present any problems for the speedometer or the
gearing. Indeed, your speedometer is about 3 mph fast at 80mph right now,
and will be about 2 mph fast with the larger tires. You will be fine.

The caluclation is
<width -- 225> * <aspect ratio -- 75%> * 2 / 25.4 + <rim -- 16> = overall
diameter. (you multiply by 2 to get the total sidewall height, and divide by
25.4 to convert from mm to inches.)





"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 ??
>
>
>

 

There will be no difference (OK, the difference will be very small).

The 245 is 20mm wider, that's 10mm off of center, which is about 3/8". This
should pose no particular problem for clearance inside the fenders.

The 70 or 75 represent a diameter change (larger in your case) of 0.4
inches. This will not present any problems for the speedometer or the
gearing. Indeed, your speedometer is about 3 mph fast at 80mph right now,
and will be about 2 mph fast with the larger tires. You will be fine.

The caluclation is
<width -- 225> * <aspect ratio -- 75%> * 2 / 25.4 + <rim -- 16> = overall
diameter. (you multiply by 2 to get the total sidewall height, and divide by
25.4 to convert from mm to inches.)





"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 ??
>
>
>

 

There will be no difference (OK, the difference will be very small).

The 245 is 20mm wider, that's 10mm off of center, which is about 3/8". This
should pose no particular problem for clearance inside the fenders.

The 70 or 75 represent a diameter change (larger in your case) of 0.4
inches. This will not present any problems for the speedometer or the
gearing. Indeed, your speedometer is about 3 mph fast at 80mph right now,
and will be about 2 mph fast with the larger tires. You will be fine.

The caluclation is
<width -- 225> * <aspect ratio -- 75%> * 2 / 25.4 + <rim -- 16> = overall
diameter. (you multiply by 2 to get the total sidewall height, and divide by
25.4 to convert from mm to inches.)





"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 ??
>
>
>

 

The width is the 225/235/245 number. The 70/75 number is the height of the
sidewall.

A 225/65, 225/70, and 225/75 are all the same width. The difference in these
tires will be the amount of sidewall, and the overall diameter -- the 65
will be the smallest and the 75 will be the tallest.

You might have noticed a loss of traction when you changed from 225s to
235s, because this would represent the width of the tire. A 225/75 and a
235/70 are within 10mm of being the same diameter.

I am a poor judge of what happens in snow, but it's difficult for me to see
where one would notice a difference in 10mm in diameter. I have to suspect
there are tread patterns and other things that enter into the discussion.



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43203D52.2560BD48@sympatico.ca...
>I will second that. We lost a 'lot' of traction when we went from a 225
> to a 235 while keeping the same profile even. Going to a wider 70
> series adds to the loss.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Bowgus wrote:
>>
>> A consideration ... if you drive in snow, and will be using the 245s they
>> may be too wide. I say this because the 235 is too wide for my XJ in snow
>> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
>> tires ... which unfortunately are due for replacement this coming winter
>> :-(
>>
>> "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 ??
>> >
>> >
>> >

 

The width is the 225/235/245 number. The 70/75 number is the height of the
sidewall.

A 225/65, 225/70, and 225/75 are all the same width. The difference in these
tires will be the amount of sidewall, and the overall diameter -- the 65
will be the smallest and the 75 will be the tallest.

You might have noticed a loss of traction when you changed from 225s to
235s, because this would represent the width of the tire. A 225/75 and a
235/70 are within 10mm of being the same diameter.

I am a poor judge of what happens in snow, but it's difficult for me to see
where one would notice a difference in 10mm in diameter. I have to suspect
there are tread patterns and other things that enter into the discussion.



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43203D52.2560BD48@sympatico.ca...
>I will second that. We lost a 'lot' of traction when we went from a 225
> to a 235 while keeping the same profile even. Going to a wider 70
> series adds to the loss.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Bowgus wrote:
>>
>> A consideration ... if you drive in snow, and will be using the 245s they
>> may be too wide. I say this because the 235 is too wide for my XJ in snow
>> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
>> tires ... which unfortunately are due for replacement this coming winter
>> :-(
>>
>> "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 ??
>> >
>> >
>> >

 

The width is the 225/235/245 number. The 70/75 number is the height of the
sidewall.

A 225/65, 225/70, and 225/75 are all the same width. The difference in these
tires will be the amount of sidewall, and the overall diameter -- the 65
will be the smallest and the 75 will be the tallest.

You might have noticed a loss of traction when you changed from 225s to
235s, because this would represent the width of the tire. A 225/75 and a
235/70 are within 10mm of being the same diameter.

I am a poor judge of what happens in snow, but it's difficult for me to see
where one would notice a difference in 10mm in diameter. I have to suspect
there are tread patterns and other things that enter into the discussion.



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:43203D52.2560BD48@sympatico.ca...
>I will second that. We lost a 'lot' of traction when we went from a 225
> to a 235 while keeping the same profile even. Going to a wider 70
> series adds to the loss.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Bowgus wrote:
>>
>> A consideration ... if you drive in snow, and will be using the 245s they
>> may be too wide. I say this because the 235 is too wide for my XJ in snow
>> ... but the XJ is a lighter vehicle I believe (unibody). I use 225 snow
>> tires ... which unfortunately are due for replacement this coming winter
>> :-(
>>
>> "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 ??
>> >
>> >
>> >