AlfaOBD w/295's

[CAROLINA CUMMINS]

Hi,

Those running 295's and AlfaOBD. What circumference did you use? I calculated it to be 2735 mm for a 34.3" tire.

 

[AH64ID]

What brand tire?

Many tire manufacturers publish rev/mile data and that’s a great starting point, but it will likely take a few adjustments to get correct.

 

[CAROLINA CUMMINS]

Falken Wildpeak AT3W 295/70R18
Manufacturer lists it at 34.3" so then I had to convert to circumference in inches then millimeters.

I assumed AlfaOBD would just let you pick size but no 295's are listed. Mostly stock sizes looks like.

 

[AH64ID]

Falken lists that size at 609 rev/mile, which is 33.1”. I’d start there.

 

[Ozymandias]

I always went with the revs/m from the spec sheet of the manufacturer.
The circumference is just a ballpark number.

 

[CAROLINA CUMMINS]

Only options I saw on AlfaOBD was a list of sizes and even tire brands. Larger sizes aren't on there. Then other option is circumference in millimeters? Did I miss another option?

 

[AH64ID]

Only options I saw on AlfaOBD was a list of sizes and even tire brands. Larger sizes aren't on there. Then other option is circumference in millimeters? Did I miss another option?

Just convert inches to mm.

 

[CAROLINA CUMMINS]

609 rev/mile - 33.1" worked out to 2641 mm so I'll try that for a bit. Thanks

 

[Ozymandias]

Only options I saw on AlfaOBD was a list of sizes and even tire brands. Larger sizes aren't on there. Then other option is circumference in millimeters? Did I miss another option?

Isn't it in the ABS unit where you can dial in the Revs?

 

[CAROLINA CUMMINS]

Isn't it in the ABS unit where you can dial in the Revs?

In the BCM on mine.