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Unread 07-16-2010, 04:24 AM   #1
Argent33
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Re-flashing for different tire size?

Anyone know how to reflash the Compass for different tire sizes?

I'm going from the stock 215/55/R18's to 225/60R18's next week

My buddy was playing with the Witech computer but only saw the option to flash the stock tire size...

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Unread 07-16-2010, 08:23 AM   #2
tjkj2002
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By law can on "flash" for a OEM offered tire size due to ESP.
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Unread 07-16-2010, 08:11 PM   #3
Argent33
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Then how have people who've put larger tires on get their Jeep's recalibrated
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Unread 07-16-2010, 08:49 PM   #4
tjkj2002
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Quote:
Originally Posted by Argent33 View Post
Then how have people who've put larger tires on get their Jeep's recalibrated
They don't,it's not possible as the dealer is legally stopped from doing it.
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Unread 07-18-2010, 06:33 AM   #5
Gramps
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They are getting them re-flashed for the 215-65R17 (28" dia) available on the Patriot. The dealer uses the menu driven StarScan set to Compass/Patriot (MK's are all the same menu), then the Tire size menu, and selects 215-65R17. If you are running a taller tire than 28" you will need to do some mental calculation to stay in the speed limit. ie: my tires are 29" and if the speedo says 60 I'm really dong about 65.

If you stay within reason the ESP is not a problem.
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Unread 07-18-2010, 07:41 PM   #6
Argent33
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Thanks Gramps! I'll give that a whirl when I get my new tires mounted
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Unread 08-20-2010, 06:59 AM   #7
TonyBG
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Is 225/65/17R are in reason? I am from Bulgaria, and our roads are in very bad condition even in the summer. ( example - YouTube - Bad roads in Bulgaria )
When I drive my Compass now, i feel every bump and hole on the road and it is kind of uncomfy. In the winter I wish I have more clearance and a lil bit more stability on the snow.

So do you think 225/65/17R are better compared to the stock 215/60? I don`t care about recalibrating the speedo, but what about the tire pressure monitoring system? Should I make some calibration there.

Thank you. Sorry about asking so much lame questions but I am still new to the Jeep community
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Unread 08-20-2010, 07:29 AM   #8
Gramps
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The higher the number on the sidewall (60 vs 65) the more air cushion and generally the better ride quality. Also the 215 vs 225 adds more air cushion too. The TPMS won't be affected.

Nice video, nice dog, awful road!
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MK Skid Plate fasteners for sale posts 68 & 69

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Unread 08-20-2010, 07:34 AM   #9
TonyBG
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Thanks Gramps, you are always here to the rescue and have the answer! 10x again. Stability will be only positively affected, and there should not be any fitting problems right?
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Unread 08-20-2010, 08:28 AM   #10
Gramps
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No problems. Many are using that size and they fit very well.
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MK Skid Plate fasteners for sale posts 68 & 69

Also visit me at Photobucket
'06 WK Grand Cherokee Limited Quadra-Drive II, 5.7
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compass , patriot , programming , speedometer , tires

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