Kim Kardashians got nothin on this "Rear"

Fuel Safe Systems in Redmond, OR, show two different aluminum fuel cells designed to fit spare tire wells on their website Fuel Safe | Racing Fuel Cells - Auxiliary Fuel Cell Bladder Tanks

Spare Tire, FCST Enduro Cell®, SA130-ED-FCST - Free Shipping For Online Orders Over $100
Spare Tire, FCST Race Safe Racing Cell®, SA130-RS2-FCST - Free Shipping For Online Orders Over $100

Check 'em out