I purchased a Reese tongue with 5-3/8" drop ($29.99) and a Reese 2" ball ($7.99) from Pep-Boys for under $40.00.

Because of the height of the rear end of the X, the 5-3/8" drop makes a trailer with 15" tires very level.

__________________
2004 BMW X5 4.4i Sterling Silver/Beige
2002 BMW 330xi Topez Blue/Gray
2001 MB CLK55 //AMG Quartz Blue/Ash
2001 Isuzu VehiCross Ebony/Gray
2006 Yamaha YZF-R1 Blue