According to Rubicon Express, the RE1540 brake lines support up to a 6" rise, as shown on RubiconExpress.com: Rubicon Express 20 Rear Brake Line Set, Stainless Steel, 4" to 6" Rise. .-RE1540" I installed these brake lines on a 2017 Jeep JKU with 3" Teraflex suspension. I took the JKU to a local brake shop to bleed the brake lines with a scanner. When the mechanic lifted the JKU onto its hydraulic lift, it was NOT able to get all four wheels off the ground before all the brake lines wereβ¦