Zeta Rearshock Preload Adjuster Showa 50B - RedREARSHOCK PRELOAD ADJUSTER EXCHANGE Quick preload adjustment by turning, not tapping! Simply by replacing the stock locknut and spring seat, the difficult preload adjustment is made easier. Instead of the locknut method, the band method used by WP and other companies can be used. The lock nut can be locked and unlocked with a 5mm hex wrench. No need to repeatedly tap in the spring when adjusting the preload, and easy to adjust by simply turning the