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Old 11-17-2011, 02:51 AM   #1
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QUESTION: Stock Steel to Rubicon Moab... and all that it entials

I've got a 2012 Jeep Wrangler Sport.

I've switched out the stock 225/75 R16 wheels/tires for 265/70 R17 Rubicon moab rims with Toyo OpenCountry MT tires.

I drive conservatively by habit and almost never squawk the tires or slide at any speed. I keep my distance on the highway and I've never had to come to a panic stop... knock on wood and by driving habit.

With these bigger tires even more so. The jeep feels even more solid and grounded than it did with stock...

Very nice setup. I've been searching and reading that this may cause unwanted engagement of the Electronic Stabilith Control at highway speeds and or when I least want it... and potentially cause my jeep to "head into oncoming traffic..."

I called my Jeep dealership here in Washington (Renton) and asked if they could re-calibrate my computer to avoid this and they said they could.

The said it would take an hour and that "it sometimes didn't take the first time" and that "they would have to check all the other sensors to make sure the programming took..."

I'm not sure what they're talking about but they're asking for $80 and 1-2 hours to do what apparently the AEV ProCal module will do in a couple minutes...

Serously, has anyone gone the dealer route and can talk to that?

What other sensors are they talking about (I did ask, but they were vauge to the point that I'm not sure I belive anything they're saying...)?


Thanks.
- Hal

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Old 11-17-2011, 07:33 AM   #2
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Quote:
Originally Posted by halzucati View Post
I've got a 2012 Jeep Wrangler Sport.

I've switched out the stock 225/75 R16 wheels/tires for 265/70 R17 Rubicon moab rims with Toyo OpenCountry MT tires.

I drive conservatively by habit and almost never squawk the tires or slide at any speed. I keep my distance on the highway and I've never had to come to a panic stop... knock on wood and by driving habit.

With these bigger tires even more so. The jeep feels even more solid and grounded than it did with stock...

Very nice setup. I've been searching and reading that this may cause unwanted engagement of the Electronic Stabilith Control at highway speeds and or when I least want it... and potentially cause my jeep to "head into oncoming traffic..."
$10 says you read that malarky on Jeepforum. The tires you put on are slightly lower and wider than stock Rubicon tires. They will have no effect on your ESP system.

Quote:
Originally Posted by halzucati View Post
I called my Jeep dealership here in Washington (Renton) and asked if they could re-calibrate my computer to avoid this and they said they could.

The said it would take an hour and that "it sometimes didn't take the first time" and that "they would have to check all the other sensors to make sure the programming took..."

I'm not sure what they're talking about but they're asking for $80 and 1-2 hours to do what apparently the AEV ProCal module will do in a couple minutes...

Serously, has anyone gone the dealer route and can talk to that?

What other sensors are they talking about (I did ask, but they were vauge to the point that I'm not sure I belive anything they're saying...)?


Thanks.
- Hal
Your speedometer is off by about 10mph. Car / SUV / Van / Light Truck Tire Calculations I'm guessing that the dealer wants to make sure that nothing else is affected when they flash the computer. The length of time they are quoting includes test driving your Jeep afterward. Since they are charging $80, I would spend $70 more and get the AEV unit.

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Old 11-17-2011, 07:42 AM   #3
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Originally Posted by daggo66 View Post
$10 says you read that malarky on Jeepforum. The tires you put on are slightly lower and wider than stock Rubicon tires. They will have no effect on your ESP system.



Your speedometer is off by about 10mph. Car / SUV / Van / Light Truck Tire Calculations I'm guessing that the dealer wants to make sure that nothing else is affected when they flash the computer. The length of time they are quoting includes test driving your Jeep afterward. Since they are charging $80, I would spend $70 more and get the AEV unit.

Everything he said...... ^^^^^
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Old 11-17-2011, 11:40 AM   #4
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ProCal ordered.
Thanks for your quick replies.

- Hal
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Old 11-17-2011, 01:03 PM   #5
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I swopped out my 16" steels for a set of Moab take offs with the 255/75/17's and never calibrated everything and have never had a problem other than the new wheels don't have TPMS so the light on the dash is always on. Since everyone here in VA drives 10-15 over the speed limit anyway I'm not too worried about the speedometer getting recal'd.
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Old 11-17-2011, 03:37 PM   #6
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Originally Posted by Mr. E View Post
I swopped out my 16" steels for a set of Moab take offs with the 255/75/17's and never calibrated everything and have never had a problem other than the new wheels don't have TPMS so the light on the dash is always on. Since everyone here in VA drives 10-15 over the speed limit anyway I'm not too worried about the speedometer getting recal'd.
Since you haven't corrected your speedo after the tire swap--your warranty is "VOID" and if you sell the jeep without notifying the new buyer, "IN WRITING", that the speedo is in ERROR--you're subject to a civil suit by the new buyer !!

Hows that grab ya ??

Doen't ask me "How do I know what I'm talking about"--it's your jeep !

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Old 11-17-2011, 03:51 PM   #7
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Wow,
Is there a time limit on the time from the swap to the time of the correction? Common sense tells me that it should be at the same time so there's no deviation... but there has to be some precident for overall variation, like if you purchased new tires and they weren't exactly the same diameter as the stock ones... (I've done this twice now for my wife's Liberty...)

I can't imagine that this is too common a concern, especially since titles here in washington have a check-box for "not the exact milage..." for things like this. (Just sold a truck where I checked that box...)

And really, what's the real world problem between 150000 and 152000 miles? Wear is virtually identical and I can't think of any buyer who would consider this to be a dealbreaker, especially if you note it on the sale paperwork. (Non-Stock tires installed for 2 weeks before computer tire size was re-programmed).

Something to think about though I suppose.

- H

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