22 Designs Axl Stiffy Spring Kit -
AXL Stiffy Spring Kit
These stiff springs will take you to another level. For hard-chargers and stiff boot lovers, these springs are 20% stiffer than their stock springs.
Berg's Ski Shop
Stiffy springs just like you are used to in the Hammerhead bindings. Get a little more push out of your bindings so you have a more active feeling. Great to see the new Axl binding coming out and now to make em' a bit more spiffy :-)
Oregon Mountain Community
Fits Axl size large binding only, and is 15% stiffer.