The Jeep sits on stock 15-inch aluminum wheels with 225/75R15 radial tires. Looking closely at this photo, you can see the front and rear tires have mismatched tread.

Trail Holdup I'm installing 265/75R16 (31.6-inch) BFG KO2 tires on my stock-ish ’11 two-door JK later this week. My current tires are 33.1 inches. I'm going down in diameter by about 1 1/2 inches.

As for what powers this Hummer-like Jeep, that would be a naturally aspirated 2.5-liter four-cylinder unit, factory rated at 120 hp and 140 lb-ft (190 Nm) of torque.