The SMJ Silver Line Spring has been a long time best seller since its release in 2015. Now we have released the new SMJ Stealth Line Spring Series. Through testing and development of the specifications and a change in the surface treatment, the Stealth Line springs provide a less rigid feel than the conventional Silver Line springs and offer excellent traction and corner speed. The Stealth Line springs are suitable for all "short-type" shocks with the total length of 20mm. Wire diameter: 1.4mm. Made in Japan