Rubicon stock tire size in computer

[jbk]

I recently put a set of stock Rubicon falken wildpeak tires on my Sport S. I wanted to set the tire size in the computer to the same setting that Rubicon's have from the factory. Does anyone know what that size is?

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[LaRock]

When I put on the Falken Wildpeak MT on my Sport S I found 33.13 put my speedo spot on compared to GPS.

 

[jbk]

FYI, I found another thread that says 32.70 is the stock setting for Rubicons.

 

[Dougstdig]

I recently put a set of stock Rubicon falken wildpeak tires on my Sport S. I wanted to set the tire size in the computer to the same setting that Rubicon's have from the factory. Does anyone know what that size is?

This is from what I posted in another thread…to find it I SEARCHED calculating tire correction.

Calculating Programer Adjustment:
1. At street pressure, Mark the tire AND the ground at a point there it touches the ground.
2. Role the vehicle until the mark on the tire comes back around and when in the same angle to the ground mark the ground again.
3. Measure the distance between the 2 marks on the ground.
4. Take this number (ladened circumference) and divide by pie…or 3.14159.
5. this should be the correct figure you key in.

Using backwards math on a tire claiming to be 37”, a ladened circumference of 115.45 / 3.14159 = 36.74890 or what you would enter into your programmer.

 

[RS3]

When I put the Tazer on my 22 the settings said 33.07" from factory. Wildpeak MT's.

 

[Gvsukids]

I recently put a set of stock Rubicon falken wildpeak tires on my Sport S. I wanted to set the tire size in the computer to the same setting that Rubicon's have from the factory. Does anyone know what that size is?

You'll have to experiment and see what works.

 

[Fouts]

You'll have to experiment and see what works.

This. It usually winds up being trial and error. Set at 33 and check speed on gps.

 

[ShadowsPapa]

Don't use the speedometer, use the odometer - set the trip meter to 0 and set your GPS device to 0 and drive. At the end of several miles, the trip meter/odo and GPS tracker should read exactly the same to the 10th mile. Speedometers round things.

Since the Falken Wildpeak A/T tire is 32.8" diameter unloaded, 33+ cannot be correct. The speedometer may seem to be the same as GPS, but things like that are off a percentage - not an actual miles per hour number - so it may appear to be right at some speeds but will be wrong at others - percentage. The only real accurate way is odometer.

Rubicon stock A/T tires will likely measure differently than the stock Rubicon M/T tires.

You are looking for rolling diameter, not advertised diameter.

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