The new progressive-type springs have been added to the SMJ silver line springs, popular among EP and GP touring car users!
These new-type springs are soft when the suspension starts moving and they become harder as the suspension stroke grows bigger. This new feature helps improve driving performance over small gaps and contributes to greater traction performance. These new-type springs also make steering response smoother.
Wire diameter: 1.4mm, Total Coils: 5.375, Length: 20mm
Made in Japan