G3, the first manufacturer to use compression spring cartridges in telemark bindings, has set what is now the industry standard. We offer three versions of cartridges with appropriate spring stiffnesses for compatibility with different telemark boots' variety of flexes. Outstanding features: Maximizes ski control Extended length to accommodate bigger boots Up to 30mm / 1.15in of spring travel Maintenance free G3 TARGA and T/9 are sold with a choice of cartridges. Refer to the binding packaging for details when choosing your binding. Features: GREEN/ WORLDCUP CARTRIDGES Recommended for newer, very stiff boots and for racing and aggressive in-bounds skiing. 42% stiffer than XMountain cartridges. Not recommended for deep powder. Produces substantial tip-dive pressure relative to other G3 cartridges. BOOTS Scarpa T1 & T-Race, Garmont Voodoo & Elektra; Crispi XR, CXR & CXU RED/ XMOUNTAIN CARTRIDGES NEW stiffer XMOUNTAIN cartridges flex bigger boots with ease for aggressive backcountry skiers and hot laps at the resort. Recommended for stiffer and new boots. SILVER/ CROSSTOUR CARTRIDGES Recommended with medium stiffness boots. Works well in a wide variety of conditions. Scarpa T2, T3 & T4; Garmont Excursion, Evo, Genesis & Venus; Crispi CXA & CXT