Bigger tires need clearance and adding that suspension lift is only half the battle. Spidertrax 1-1/2” thick, 5 on 5" bolt circle, 6061T6 aluminum spacers are an easy way of spacing out front and rear 2007-2018 Wrangler JK, 2006-2010 Commander XK, 2005-2010 Grand Cherokee WK, & 1999-2004 Grand Cherokee WJ axles. This added spacing is necessary for keeping those larger tires from crashing into your frame rails and suspension links at full turn. Simply bolt-on like a wheel, and off to the trails you go.