Hey guys I'm programming a custom tune and it's asking for tire size ( mm ) what does this mean? I'm running 325/60/R20 Terra grappler in case someone wants to help me know what number to type in, thanks!

Also* I convert 35 inches to Mm and it came to 889 mm but the lowest my programmer will go is like 1200.. What do I do?! Thanks guys! Hopefully I can get a fast response

 

It might be looking for circumference, see if it will accept 2821mm

 

Did you not read the phookking manual?

See page 16, 17:

The numbers on this screen represent the circumference (in mm) of your tire size.

The default value the Evolution displays is the current value stored in
the PCM. Adjust the tire size by pressing the [UP] and [DOWN] arrow keys.
The following table will help you determine your tire circumference by
matching your tire size with the common sizes listed. For example, if your
tire size is 285/ 65-18, the value (circumference) you enter into the Evolution
is 2600. You may also use the formula provided to determine your
approximate tire circumference. Finally, you may also measure your tire’s
circumference by marking your tire and rolling it one complete revolution
and measuring the distance in inchesor millimeters. If you measure in
inches, multiply the distance by 25.4 to convert to mm. (ex. 91.3 inches x
25.4 = 2319 mm). The range of change is from 2000mm to 3500mm in
increments of 1mm.

Width Ratio Rim Circumference Tire Size
265 70 16 2441mm 33 2632mm
275 70 16 2485mm 35 2792mm
305 70 16 2617mm 37 2951mm
215 75 16 2289mm 38 3031mm
245 75 16 2430mm
265 75 16 2524mm Circumference Equation:
285 75 16 2618mm [(width * ratio * 0.02) + (rim * 25.4)] * 3.1415
295 75 16 2666mm Steps:
305 75 16 2713mm 1. Multiply Width, Ratioand 0.02
315 75 16 2760mm 2. Multiply Rimand 25.4
325 75 16 2807mm 3. Add Step #1 with Step #2
265 70 17 2521mm 4. Multiply Step #3 with 3.1416
285 75 17 2698mm 5. The result will be the circumference of your tire in mm.
315 75 17 2840mm
275 65 18 2559mm
285 65 18 2600mm
285 60 18 2510mm
325 60 18 2660mm


Sorry aboot the formatting - just go and look - the formula is in there.

Confirm after with a GPS. Don't forget to correct for ~3% 'squish'.

No Manwell? git it here: http://www.edgeproducts.com/installa...structions.php

Scroll down to Model 15051.

BTW - if yer not gonna bother to read that manual, then I'd advise you to leave ALL the other pretty buttons alone. Or yer truck go *BOOM*

MGD

 

If this is a custom tune..the tire size should already be already programmed in there from Bill, if that is the tire size you gave him.

 

I read that as he's entering "custom settings", not a custom program - huge difference.

I think these are canned Gryphon tunes he's playing with - a SWAG, though, lol.

Otherwise, yer 110% correct.


MGD

 

No worries .....He'll have fun "experimenting" with it..hehe