JL Mini tire size?

[Oneshotlucky]

I’m looking to see if someone can help? I have a Tazer JL mini installed. My tires are BFG 34x10.5x17. The lift shop entered tire size as 32.92? Manufacturer says the tire is 33.5. So do I enter the 33.5? Or do I measure tire under load as mounted and inflated? If that’s the case from center of hub to top and bottom and I come out about 33’ so I’m a bit confused on what I should set tire size at. I have it set at 33.0 both the speedometer and digital read exactly the same. I used an app on the phone and it’s right on with the other two. Am I good? Shift points seem ok, smooth no high rpm before next gear. Any advice welcomed!

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[sharpsicle]

Sounds like everything was done correctly. You always want to use real measurements, which it looks like the shop did. If your speedo matches a GPS speed, you're set. Don't worry about it.

 

[bleda2002]

If it matches you are good, but make sure your phone is not plugged in when it's measuring as it will actually use the speedo speed instead of its own gps

 

[sharpsicle]

If it matches you are good, but make sure your phone is not plugged in when it's measuring as it will actually use the speedo speed instead of its own gps

This has been talked about multiple times, but never shown to actually be a thing. I'm genuinely curious, can you point me somewhere that shows the phone actually receives and uses this data from the vehicle? To do that would present security concerns that I don't think either side would want to open up.

All the evidence I've seen so far has been anecdotal and/or people not paying attention while "testing". I'd love to see something concrete from either the uConnect or the phone OS side showing the data transfer or use.

 

[bleda2002]

This has been talked about multiple times, but never shown to actually be a thing. I'm genuinely curious, can you point me somewhere that shows the phone actually receives and uses this data from the vehicle? To do that would present security concerns that I don't think either side would want to open up.

All the evidence I've seen so far has been anecdotal and/or people not paying attention while "testing". I'd love to see something concrete from either the uConnect or the phone OS side showing the data transfer or use.

It's not uconnect it's android auto, If you just Bluetooth audio it shares some data like contacts, audio etc, but it you use android auto it shares the GPS data and the car shares back to it as well.

I had this happen when I was setting tires the first time, had it connected and GPS and it was matching stock tires despite going to 37s. Had to disconnect to show actual speed.

 

[NachoRuby]

Mine did not do that when I used Waze and Android Auto. I had to go back to adjust the speedometer a couple of times, so I know it did not. I used Waze and Android Auto to get it set.

 

[ShadowsPapa]

The truck stores the tire sizes in MM circumference.

Tazer, from what I am TOLD, allows whole and half numbers in inches.
JSCAN uses whole and quarter inches.
AlfaOBD uses millimeters like the truck stores it.
I do not use speedometer as that can still be off a fair amount. Speedometers show whole numbers.
I use the ODOmeter. I set trip meter to 0, hook up my GPS and trip tracking, and drive 15-20 miles. If I have the tire size correct, the miles driven should match to the tenth of a mile.

This is what mine was set to before I put the General A/Tx tires on it-
Dynamic Tire Circumference (All or Rear) (0-65534 mm): 2508.000 mm

That's 31.43 diameter, on the truck as the tire is actually larger off the truck.

 

[AZJT]

As has been discussed in other threads, you may need to 'play' with the Tazer settings until you get it right - don't sweat it, many of us have experienced this. You may have to tweak the Tazer size up or down until it matches another independent source (I used Waze on my phone), but don't get frustrated if it takes a few adjustments. It is what it is. If it matches now, then leave it alone.

 

[Renegade]

This has been talked about multiple times, but never shown to actually be a thing. I'm genuinely curious, can you point me somewhere that shows the phone actually receives and uses this data from the vehicle? To do that would present security concerns that I don't think either side would want to open up.

All the evidence I've seen so far has been anecdotal and/or people not paying attention while "testing". I'd love to see something concrete from either the uConnect or the phone OS side showing the data transfer or use.

It’s real. All gps speed apps might not do it but some do for sure. I could hold a constant speed, unplug, and watch it change on the phone.

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