Description: (from ibexbikes.com) Frame: 6061 Aluminum 4-Bar Full Suspension - Ignition frames are extremley ruggedly built all-mountain style frames for technical or aggressive riding. Bi-Oval downtube and fully braced and gussetted main frame resists flex. 4-bar swingarm design allows 120mm of rear travel by way of the a standard 6.5" (165mm) rear shock - cartridge bearing pivots assit in smooth and stable action of the rear suspension.