The Ribcage has been one of the only rims to have true design breakthroughs in recent years. Since its introduction the competition has scrambled to catch up but still remain a poor copy, so if it doesn't say GSport on the rim, don't expect it to perform like a G-Sport rim.
Proprietary High Strength Aluminum
Double Wall Cross-Section
Spoke holes re-enforced w/ patented ribs to prevent pull through
Cross-lace pattern for increased strength
Directional spoke hole drilling
Fully welded seam
Sizes:20" only Drillings:36 hole Weight:500g / 17.6oz Width:36mm Height:18mm ERD:389mm U.S. Patent 7,427,112