Hi all, new here. HELP me pls. I would like to install 35x12.5R22 with -18 offset wheels on to my 2020 Silverado 2500hd WT. Stock wheels are just too small 245/75r17. already have 2-3'' rough country lift kit on. my concern is power loss, will it be felt? already know that speedometer will be off by a lot. do i have to change gears?