First Time Forscan User; Tire Circumference Recommendation

[CLopey]

Hey all,

Just fiddled around with Forscan for the first time. I mainly did it to calibrate my speedometer/odometer to my new tire size. I have 265/70/17 BFG Trail Terrains which are supposedly 31.6”. Gemini AI suggested I change my tire circumference to 2463mm. Is this right?? I now notice that my MPH are about 2-3 OVER what the Google Maps GPS is reading. Google says this is how the trucks normally come from the factory. Help please!

While you’re here, any other mods I should consider?

I did Bambi mode, disabled auto start/stop, changed the battery state of charge to 90%, and changed the Sync screen to the Ford Performance with the cobra (pretty cool!)
I tried doing global windows to roll the windows down with the key fob (didn’t work) and I tried to change the blinkers to blink 5x instead of 3 for a lane change (didn’t work).

Thanks as always!

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[TruckBox]

https://forum.forscan.org/viewtopic.php?t=15994

https://www.ranger5g.com/forum/threads/forscan-to-set-tire-size-size-out-of-range.29045/#post-668089

Go measure your tire diameter, plug it into a circumference calc, and then convert that to mm. Then use GPS to double check. None of the tires ive taken a tape measure to equal their rated diameter.

 

[tm1506]

Hey all,

Just fiddled around with Forscan for the first time. I mainly did it to calibrate my speedometer/odometer to my new tire size. I have 265/70/17 BFG Trail Terrains which are supposedly 31.6”. Gemini AI suggested I change my tire circumference to 2463mm. Is this right?? I now notice that my MPH are about 2-3 OVER what the Google Maps GPS is reading. Google says this is how the trucks normally come from the factory. Help please!

While you’re here, any other mods I should consider?

I did Bambi mode, disabled auto start/stop, changed the battery state of charge to 90%, and changed the Sync screen to the Ford Performance with the cobra (pretty cool!)
I tried doing global windows to roll the windows down with the key fob (didn’t work) and I tried to change the blinkers to blink 5x instead of 3 for a lane change (didn’t work).

Thanks as always!

For reference I have my Cooper Road & Trail 265/70/17 set in Forscan at 2398 and this makes my speedometer accurate in Google Maps and Waze. The original setting was 2360.

 

[Colo_Ranger]

I’ve always had to fiddle with the mm number to get it right. There’s “measurement” and then there’s “real world”. No tire brand is exact on their tire size.

 

[Mighty Little Blue]

Turn on cornering mode. It turns on the fog lights with use of turn signal or when steering wheel is turned at lower speeds.

 

[airline tech]

i don't remember them coming on with turn signal (cornering mode) - but yes if below I think 20-MPH they will come on (with a certain degree of steering input) - I have mine enabled - its somewhat annoying but at the same time adds some light on a dark corner turn. (I am on the fence - if I actually like it) - I think the Fogs On with Turn Signals - is a separate setting, I would have to refresh - on this one

 

[Mighty Little Blue]

I might be mistaken on the turn signal, or maybe it was a 2nd setting. Not with my truck now so just going from memory. Now that you brought it up not 100% sure on signal turning them on. I still like the feature either way.

 

[dozxab]

Two things. All speedometers read a little fast due to the fact that car makers have been sued by speeders if it reads slow. I use mile markers along the side of the road until the odometer is right on. I do a 10 mile stretch but do what works for you. I went from 2360 to 2438 for my Continentals in 265/70R17 to read right. Given that they run a bit taller than BFG, drop down to 2425 or so and see what that does.

 

[PltFX4]

Just hoping this is helpful... originally from some post here on Ranger5G Forum...

 

[dozxab]

It does

Just hoping this is helpful... originally from some post here on Ranger5G Forum...

It does vary by brand but a good start.

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