To control our rear springs we went with a set of Fox three-tube bypass shocks with a 21⁄2-inch body. These shocks are overkill for a rockcrawler, but when you are building an IFS trail truck there is no guarantee it will only be a rockcrawler. Plus our prior experience with Fox Racing has been phenomenal, so we were excited to use its product. We also ran Fox air bumpstops at each corner. The front uses 2-inch travel units and the rear 4-inch. Notice how the bumpstop mount is built away from the frame to clear the leaf spring at full compression.