This off-road jack mount spacer kit from Rugged Ridge is designed for the Spartacus Tire Carrier system and fits 07-16 Jeep Wrangler JK/JKU When you have the Rugged Ridge Spartacus Heavy Duty Tire Carrier and want to use the off-road jack mounting system you will need extra spacers to compensate for the additional thickness of the tire carrier. This spacer kit comes complete with spacers and mounting hardware.