285/75/18 is big compared to 275/70/18....35” vs 33” roughly. Maybe you meant 285/70/18 which is back to 34” realm. Either way on an lc Youll need new aftermarket springs in the rear And on the front you’ll need diff dropand aftermarket tb’s for 285/75/18. You won’t need all that for 275/70/18 cept maybe rear springs to offset bumper and correct sag. You can get that lift and bumper weight support with multiple spring options but a True 2” over factory in the rear will likely require aftermarket upgrade in frontWould I be able to use 285/75 on 18's with no lift or 275/70 is the a better combo in terms of mileage, ride, speed and comfort?
I have the metal ARB bumper in the back for over 5 years now and feel the back may be sagging a bit due to the weight? Factory shocks were replaced with OME shocks about a year ago, should I replace with the factory springs or adjust T-bar is enough? I'm hoping to get 3/4 - 1" of lift in back.