Thule 971XT Helium 3-bike Hitch Mount

From their description:


Thule 971XT Helium 3-bike - Thule Hitch Mount Bike Racks

The Thule 971XT Helium is an ultra-light aluminum hitch rack bike carrier that is near half the weight of a traditional bike carrier. The Thule 971XT Helium makes installation and removal easier and safely carries three bicycles behind your vehicle.

Holds up to three bikes, two bikes on a Class I hitch
No-tool installation, simply load into the hitch receiver and tighten receiver knob
Narrow cradle arms hold a wider range of bike frames including smaller children's frames
T3 Cradles hold bikes in place for maximum frame protection and stability
Patented No-Sway Cage prevents bike-to-bike contact
Hitch Switch lever tilts carrier from vehicle for trunk, hatch, or tailgate access
Includes integrated locking cable and receiver lock knob to secure bikes to hitch rack and hitch rack to vehicle
Hitch adapter included to accommodate 1 1/4" or 2" receivers, no accessory purchase required
Bike arms fold down when not in use or for storage
Hitch switch for fold down arms
Stinger for improved receiver fits and better ground clearance
Lanyard for receiver pin
Models: 970 2 bike; fits both 1.25" or 2" receivers 971 3 bike; fits both 1.25" or 2" receivers
The Helium will not fit a Class I hitch made by Hidden Hitch, Drawtite, or Reese without modification
For all 1 1/4" hitches, Helium stinger foot must be able to extend 2 5/8" from center of pin hole into receiver hitch without obstruction

Durable, lightweight, just doesn't work easily with my newer mountain bikes (DH & Ibis Mojo due to small opening between TT and downtube). Works fine with my former Giant Trance X. Used for a couple years. Have everything, including integrated locking system for both the rack and the bikes (very nice feature).

More info:
http://www.rackattack.com/product-pages/product-pdf/thule-971xt-helium-instructions.pdf
http://www.rackattack.com/product-pages/thule-971xt-helium.asp