Went from 215/70R14 to 235/75R15, now to fix the speedo

[DakarMarc]

Hey Folks,

Slap me now, I know...


Anyway I have searched and seen the calculators etc, but I am trying to find out exactly which size of new gear to change the speedo reading. The 2wd that had the 14's with 3.73 rear end now has 30x9.5/15 and will eventually be shod with 235/75R15 when these wear out. I want to change my speedo to be as accurate as possible for the new 235's. I know that the 4x4's had 15 inch rims, would it be easier or even possible to just swap out that gear tooth with mine or is it easier to figure out and buy the new gear tooth that has been discussed in the tech section. Of which I am trying to figure out how to do that calculation anyway.

Any thoughts and assistance would be great.

 

[Colin]

Pretty sure you have an electric speedo so the gear won't help you unfortunately. However i put 235s on my truck and the different is minimal, like 4 kms.

 

[DakarMarc]

According to the calculator on this site, the difference is almost 14%, and I have noticed 10 + km difference in following my usual drive to work etc.

 

[Colin]

Wierd

 

[DakarMarc]

Anybody else?? Surely someone else has come across this issue. How much has my speedo really changed??

 

[daniel3507]

there is a calculator online that i use a lot and it said that your speed will be 4.6 mph faster than what your speedo is showing. sorry i cant figure out how to convert that to kms

 

[DakarMarc]

could you direct me that calculator??

 

[daniel3507]

http://4lo.com/

if you look on the left you will see all of them. lots of good information

 

[DakarMarc]

thanks