ionic 5" stainless steel curved nerf bars compatible with 2009-2018 dodge ram 1500/2500/3500/2019 1500" classic crew cab(excl. 09 2500/3500) ionic automotive the ionic stainless curved nerf bars are some of the best nerf bars on the market. ionic bars are a great choice for harsh environments with a stainless finish. they are built strong and feature wide step pads to ensure that you and your passengers enter and exit your vehicle safely.