Each rear tube bumper features smooth ground welds for an unbelievable look and further rust protection. No other tubular bumper manufacturer goes to the expense of smooth grinding their welds. This exclusive smooth grind process virtually eliminates small weld "pockets" that never seem to get full paint coverage and tend to rust over time. They are "E-Coated” to ensure a no rust finish. This special process provides an electrostatic applied under coating that seals the raw steel. By having this exclusive undercoating, the bumpers can take small rock chips and still maintain their rust protection. Finally, each bumper features welded end caps rather than plastic end caps. Gone are the days of constantly replacing those lost tube bumper end caps after a long day on the trail. Rear Bumpers have a larger 17" rear opening allowing the use of oversized tires (up to 31") on the factory spare tire mount. It also features an optional frame mounted hitch option that allows for lightweight towing (2,000lb towing weight, 200lb tongue weight capacity). Most other rear tube bumpers with integrated hitch boxes do not recommend towing therefore making the hitch box virtually useless.