Will changing wheels/tires damage suspension

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Sissy2015

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I have a 2008 wrangler JK. I just installed a set of 17” Fuel Assault wheels 9 inch wide on 285/70/17 tires. My Jeep is stock. Will this damage my suspension or change the suspension geometry? What about gear ratio? Thanks
 
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Lift kits above 3 inches are when you need to be worried about the geometry of the bits. Other than that, No, you will be fine, I have that size tire and about that size wheel. ((I forget if it is 8.5 or 9)

They are very common sizes. You are probably going to get some rubbing at full turn, but it may just be the plastic air dam which is easily removable or cuttable. You will need to adjust the tire size in the computer. Most of us here use the JSCAN app. Tons of options and a powerful tool for jeep owners that are going to do any modding. Get the blutooth dongle that their website suggests.

If you don't change the size in the computer the shift points for the transmission will be wrong. Unless you have a manual, then it is just so you know how fast you are going.
 
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MacGuyver said:
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Check out the tools on this site, they have quite a few and they are super useful.

Lift kits above 3 inches are when you need to be worried about the geometry of the bits. Other than that, No, you will be fine, I have that size tire and about that size wheel. ((I forget if it is 8.5 or 9)

They are very common sizes. You are probably going to get some rubbing at full turn, but it may just be the plastic air dam which is easily removable or cuttable. You will need to adjust the tire size in the computer. Most of us here use the JSCAN app. Tons of options and a powerful tool for jeep owners that are going to do any modding. Get the blutooth dongle that their website suggests.

If you don't change the size in the computer the shift points for the transmission will be wrong. Unless you have a manual, then it is just so you know how fast you are going.
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What about gear ratio?
 
Tire size alone won’t change the geometry of drive shafts and such, however it will affect speedometer, fuel mileage, and demand on the motor/trans. Also, ANY lift change to your Jeep WILL AFFECT the geometry of the drive shafts and cause early wear. I lifted mine 2.5 inches and the front drive shaft cv joint at the transfer case went quickly. I recommend having a new shaft made/installed with a double “U joint” where it connects to the transfer case. I’m getting a heavy duty shaft made (about $850) and installing myself. For years I never lifted a vehicle and everyone told me the same thing about “below 3” lifts won’t do anything to any parts.” I recommend you get the heavier shaft even if you only lift 2”.
 
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Sissy2015 said:
3.73 rear axle ratio
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If it's an auto, 4.88 gears would be ideal runnin 33's.

38gears.png
 
I have a 2015 Wrangler Rubicon and ordered and 17×9 rim with a -12 offset and running a 295 70 R17 all terrain tire, will I have a scrubbing issue?
 
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