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New to Jeeps. Just bought a 2009 unlimited Rubicon.

Stock tires are 255/75R17 (right?)

Guy I bought the Jeep from had just put on new tires.

265/70R17

Am I in trouble? The Jeep is my wife's, so it is not driven hard.

Thanks
 

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Random Dude
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3,039 Posts
New to Jeeps. Just bought a 2009 unlimited Rubicon.

Stock tires are 255/75R17 (right?)

Guy I bought the Jeep from had just put on new tires.

265/70R17

Am I in trouble? The Jeep is my wife's, so it is not driven hard.

Thanks
Your new tires are:

  • 1.6% smaller in diameter at 31.6" down from 32.1"
  • 4% wider at 10.4" up from 10"
  • 1.6% smaller in circumference <-- this is your amount of odo, speedo error
You're fine. If you like those tires, just fookinrunnem :rockon: Better on the street and in the sand, worse for ground clearance.

If you want the factory tires, find some takeoffs for cheap from someone who stepped up to 35s immediately . . .
. . . and sell your 31.4x10.4R17s to someone (with a Tacoma or something :dunno: :D ).​


If you want to go up in tire size, just search JKO - it's been discussed a time or two . . . hundred . . . thousand :laughing:
 

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Random Dude
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Holy crap with the math and English. Mathematical you are correct, but

depending on brand of tire it could be taller or smaller.

Pissing off my wife since way back
Excellent point! :beer: Advertised tire sizes don't always match up with reality.

Tape measure is your friend, and maybe GPS-verify the odometer error to know the true effective tire diameter.


Trust but verify . . . :cwm13: . . . mostly verify :laughing:
 
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