As with the M1-A6, HydroDynamics USA spared no expense in the design and testing of the all-new M1-A4 iShocks. As the original shock guys and still best selling pit bike suspension manufacturer, no one has more experience, commitment and dedication to the hardcore rider than iShock.

The M1-A4 iShock ™ features externally adjustable nitrogen pressure, spring preload, rebound damping and compression damping, For durability the M1-A4 uses only the best quality materials from certified suppliers which include a 12mm hard chrome plated chromoly shaft, aircraft grade 6061 aluminum bodies, and the same NOK brand seals from Japan that are found in factory race team suspension. Performance is enhanced with the use of high quality stainless spherical bearings at the mounting points and a high quality chrome silicone progressive rate spring that will out perform any straight rate or multiple spring design.

MORE STRENGTH. MORE TRAVEL. BETTER PERFORMANCE .

As with all iShock's the M1-A4 is completely tunable, totally rebuildable, and backed by a lifetime warranty and a 100% satisfaction guarantee.