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your CS was correct when it was on stock wheels and tires with what was it 6.5 BS. So that is your target. Tire diameter and the BS all effect that target of being in CR range. going say moved that point a lot. The tire will be more a 32 on the jeep, that is stock on a Rubicon anyway. But stock rubi 32s were more like 31.5 as well. So you have a real 32. not much changed but that BS of 4.75. You try those on stock wheels? would give best CR for you and the thinner wheel hold better at air down by a lot. I would run a 8.5 on any 12.5 wide tire as long as enough side wall. I run a 17x9 at 4.25 on a 37. still rubs a bit at lock in stuff.
ratio wise you off even with .5 narrower on the out side of center point is hitting inside edge. Most jeepers really dont care about CR. It does effect how tire handles on street mosty.
standard BS fro say 35x12.5x XX 4.5" 37" its more 4-4.25< rubs a bit at lock. 40s will need 3.5.. Taller tire makes up for CR to a point. I had 35 on a 15" wheel on a jk and to make that work you must have no more then 3.75bs 3.5 would have been better. THe CR was total wack. drove about 4 years that way. then went to 37s at 4.25. Thing went from feeling looser then i like and not cornering well ( jeep is not a sports car). it takes handle a lot better on 37 street that do not run much anyway. but that jeep can cut corners rather good for 4.5 lift as well. But i moved track bar roll centers. steering as well. front and rear. less wagging.
ratio wise you off even with .5 narrower on the out side of center point is hitting inside edge. Most jeepers really dont care about CR. It does effect how tire handles on street mosty.
standard BS fro say 35x12.5x XX 4.5" 37" its more 4-4.25< rubs a bit at lock. 40s will need 3.5.. Taller tire makes up for CR to a point. I had 35 on a 15" wheel on a jk and to make that work you must have no more then 3.75bs 3.5 would have been better. THe CR was total wack. drove about 4 years that way. then went to 37s at 4.25. Thing went from feeling looser then i like and not cornering well ( jeep is not a sports car). it takes handle a lot better on 37 street that do not run much anyway. but that jeep can cut corners rather good for 4.5 lift as well. But i moved track bar roll centers. steering as well. front and rear. less wagging.
