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Unread 07-12-2011, 11:44 AM   #1
stormer1092
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225 vs 235. New tires

I have been running 225/75/15 tires since i got the jheep and recently picked up 235/75/15 I know they are only an inch bigger but what are you guys getting for gas mileage and anything different with the slightly bigger tires?

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Unread 07-12-2011, 12:04 PM   #2
1stblack97ZJ
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I'm currently running 235/75/16s stock, and they don't rub.

Gas mileage may go down a bit, but not really a noticeable amount.
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Unread 07-12-2011, 02:19 PM   #3
General_Jeep
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I currently run 235/75/15 They felt like they made a difference around the bends. They seemed to control the Jeep a little better. Not sure about mileage loss but your speedo will be about 5mph or so off.
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Unread 07-12-2011, 03:51 PM   #4
Crasher
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The 235/75X15 tire is only 15 mm taller which is about .6". That's about a 2 % difference, which is how much lower your speedo will be. It shouldn't affect your mpg enough to notice after you correct for your odometer being 2% lower also.
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Unread 07-12-2011, 04:53 PM   #5
fisher1630
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I put on 235/75/15 ATs 3 years ago when i needed new tires getting rid of my 225s. I noticed no difference in fuel economy also, I think the speedometer reads fast from the factory because now with the bigger tires my speedometer is dead on with my gps.
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Unread 07-12-2011, 05:27 PM   #6
mbgp
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dude just go for the 245s. I just got them about 2 months ago from the original 225, and not only do they look awesome and give the ZJ a more agressive look, but I experience no rubbing at all.
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Unread 07-12-2011, 05:35 PM   #7
davigzj
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Ditto on the going from 225s to 235s put the speepo right with the GPS.
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Unread 07-12-2011, 05:38 PM   #8
isenior
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Hummm how come you all seem to have 15 inch wheels? I think most of the ZJs here in the UK have 16 inch wheels and run 225/70/16.
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Unread 07-12-2011, 05:46 PM   #9
Corrupt
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Quote:
Originally Posted by isenior View Post
Hummm how come you all seem to have 15 inch wheels? I think most of the ZJs here in the UK have 16 inch wheels and run 225/70/16.
I was wondering that myself, but mine was purchased by the original owner in Louisiana. The Jeep still has the original rims on it and is sitting on 225/70/16's. I also have been wondering what the tallest tire I can fit without rubbing with the factory "up country" suspension. I have seen some sites say that 30x9.50 is the maximum with no rubbing. With the "up country" suspension shouldn't we be able to go up an inch in tire size to the 31's?
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Unread 07-12-2011, 05:55 PM   #10
davigzj
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I had a 94 Zj limited that had 16s my now 98 has xj steelies.. came factory with aluminum wheels 225 75 15s bought used don't know what happened to them also 15 tires are less pricey than 16s..
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Unread 07-12-2011, 07:03 PM   #11
Buzz98zj
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Quote:
Originally Posted by Corrupt

I was wondering that myself, but mine was purchased by the original owner in Louisiana. The Jeep still has the original rims on it and is sitting on 225/70/16's. I also have been wondering what the tallest tire I can fit without rubbing with the factory "up country" suspension. I have seen some sites say that 30x9.50 is the maximum with no rubbing. With the "up country" suspension shouldn't we be able to go up an inch in tire size to the 31's?
I was thinking the same thing. I was gonna try 31"s with the up country but haven't bought tires yet. If you do it let me know how it works.
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