Tire Size Question
07-03-2005, 06:45 AM
#1
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Tire Size Question
Yep another one,
A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
he wants to put 31s on it. His question to me how bad will his mileage
suffer? He averages about 17-18 MPG now with gas the way it is he uses the
TJ as the daily driver and drives 120 miles round trip to work each day.
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Coasty
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A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
he wants to put 31s on it. His question to me how bad will his mileage
suffer? He averages about 17-18 MPG now with gas the way it is he uses the
TJ as the daily driver and drives 120 miles round trip to work each day.
--
Coasty
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07-03-2005, 11:34 AM
#2
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Re: Tire Size Question
If he has a X, it is the 4.0. The 31's won't hurt it that bad, he just
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
07-03-2005, 11:34 AM
#3
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Re: Tire Size Question
If he has a X, it is the 4.0. The 31's won't hurt it that bad, he just
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
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07-03-2005, 11:34 AM
#4
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Re: Tire Size Question
If he has a X, it is the 4.0. The 31's won't hurt it that bad, he just
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
07-03-2005, 11:34 AM
#5
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Re: Tire Size Question
If he has a X, it is the 4.0. The 31's won't hurt it that bad, he just
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
won't be using 5th gear much. When I put 31's on my 2002 X, i found I was
running 70 in 4th at 2000 rpms. It still had get up and go. That was with
the 3.07 gears which are stock in the X.
Patrick
Ô¿Ô
"Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
news:xqOdnYwIBq9YXFrfRVn-tQ@comcast.com...
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires
> 215/75R-15, he wants to put 31s on it. His question to me how bad will
> his mileage suffer? He averages about 17-18 MPG now with gas the way it
> is he uses the TJ as the daily driver and drives 120 miles round trip to
> work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply
>
07-03-2005, 12:04 PM
#6
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Re: Tire Size Question
Proably not a lot. It will depend more on exactly what speeds he runs on
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
07-03-2005, 12:04 PM
#7
Guest
Posts: n/a
Re: Tire Size Question
Proably not a lot. It will depend more on exactly what speeds he runs on
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
07-03-2005, 12:04 PM
#8
Guest
Posts: n/a
Re: Tire Size Question
Proably not a lot. It will depend more on exactly what speeds he runs on
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
07-03-2005, 12:04 PM
#9
Guest
Posts: n/a
Re: Tire Size Question
Proably not a lot. It will depend more on exactly what speeds he runs on
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
his commute. The tire change will move him over about half a gear (old
effective gear ratio is about in the middle between two new effective
gears). If that means the engine is overreving or lugging, mileage will
sink rapidly. It also means that 5th gear is not going to be very useful
most of the time.
A TJ doing 120 miles a day with $2.39 gas is not a happy combination.
Coasty wrote:
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
07-03-2005, 03:43 PM
#10
Guest
Posts: n/a
Re: Tire Size Question
Before the 31"s my Brother-in-law's '94 YJ four banger could go any
speed he wanted on the straight and level, and got a ticket for ninety,
after the extra weight limited that to seventy miles per hour and that's
with a tailwind: http://home.att.net/~taschers/beach03.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Coasty wrote:
>
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
> --
> Coasty
> SEMPAR PARATUS
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>
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speed he wanted on the straight and level, and got a ticket for ninety,
after the extra weight limited that to seventy miles per hour and that's
with a tailwind: http://home.att.net/~taschers/beach03.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Coasty wrote:
>
> Yep another one,
> A friend has a 2.5L TJ X, 5 speed tranny,with standard OEM tires 215/75R-15,
> he wants to put 31s on it. His question to me how bad will his mileage
> suffer? He averages about 17-18 MPG now with gas the way it is he uses the
> TJ as the daily driver and drives 120 miles round trip to work each day.
>
> --
> Coasty
> SEMPAR PARATUS
> (ALWAYS READY)
>
> Remove The SPOOGE To Reply