speedometer/tire size
 

i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
this affect the speedometer reading. thanks....

Re: speedometer/tire size
 

Your originals are about 28.8" tall and the new ones will be about 30.5
so your speedo will read about 5.5% slow. eg: at a reading of 65 you
will actually be going around 68.5

--
jeff


Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

Your originals are about 28.8" tall and the new ones will be about 30.5
so your speedo will read about 5.5% slow. eg: at a reading of 65 you
will actually be going around 68.5

--
jeff


Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

Your originals are about 28.8" tall and the new ones will be about 30.5
so your speedo will read about 5.5% slow. eg: at a reading of 65 you
will actually be going around 68.5

--
jeff


Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

It will probably become more accurate. Can you borrow a gps to measure
speed?

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________

Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

It will probably become more accurate. Can you borrow a gps to measure
speed?

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________

Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

It will probably become more accurate. Can you borrow a gps to measure
speed?

tw
__________________________________________________ ___________________
2003 TJ Rubicon * 2001 XJ Sport * 1971 Bill Stroppe Baja Bronco

"There is a very fine line between 'hobby' and 'mental illness'."

Pronunciation: 'jEp Function: noun Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80" wheelbase, 1/4-ton
capacity and four-wheel drive used by the U.S. army in World War II.
__________________________________________________ ___________________

Lee Jordan wrote:
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

Did you really change from 15 to 16 inch rims?
Yes: Speedometer/odometer 5.5% slow
No: Speedometer/odometer 2% slow

A more important question would be 'What was the size of your stock tires?"

FWIW: Jeep speedometers are almost always miscalibrated. My unscientific
test with a roadside radar unit revealed my WJ to be 3% fast with stock size
tires.




"Lee Jordan" <GoingBallistic@webtv.net> wrote in message
news:23068-44564858-431@storefull-3358.bay.webtv.net...
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

Did you really change from 15 to 16 inch rims?
Yes: Speedometer/odometer 5.5% slow
No: Speedometer/odometer 2% slow

A more important question would be 'What was the size of your stock tires?"

FWIW: Jeep speedometers are almost always miscalibrated. My unscientific
test with a roadside radar unit revealed my WJ to be 3% fast with stock size
tires.




"Lee Jordan" <GoingBallistic@webtv.net> wrote in message
news:23068-44564858-431@storefull-3358.bay.webtv.net...
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>

Re: speedometer/tire size
 

Did you really change from 15 to 16 inch rims?
Yes: Speedometer/odometer 5.5% slow
No: Speedometer/odometer 2% slow

A more important question would be 'What was the size of your stock tires?"

FWIW: Jeep speedometers are almost always miscalibrated. My unscientific
test with a roadside radar unit revealed my WJ to be 3% fast with stock size
tires.




"Lee Jordan" <GoingBallistic@webtv.net> wrote in message
news:23068-44564858-431@storefull-3358.bay.webtv.net...
> i'd like to switch my tires from 235x75x15 to 245x75x16. how much would
> this affect the speedometer reading. thanks....
>