Bump stops for the Jeep Wrangler JL that form part of the 2018-2023 Wrangler suspension & bushings on Extreme Terrain come in many different sizes and materials to match all your needs for fine-tuning your vehicle’s suspension. Some are made from polyurethane, which is much more durable than the stock rubber bump stops even if it’s a bit stiffer. Other Wrangler JL front bump stops are spacers designed to limit travel on already lifted suspensions, manufactured from 6061 billet aluminum and given a hard anodized finish. Rear bump stops are just as varied, with polyurethane, aluminum, and valved, chrome-plated CNC-machined steel types to meet your suspension needs. Whatever their configuration, though, these bump stops help to smooth out the ride of your Wrangler and keep things on a more even keel for enjoyable off-roading.