Rear Shock Spring Spring Color:Purple Newly engineered for IDM Superbike

Newly engineered for IDM Superbike use

The only difference is the omission of the compression reservoir and

and long-range comfort

The Wilbers suspension conversion provides a noticeably improved fork response by replacing the linear fork springs with progressive ones

We also fine‑tune chassis geometry by increasing negative travel slightly while maintaining seat height for a neutral

Rear Shock Spring Spring Color:Purple Newly engineered for IDM SuperbikeThe Hyperpro Progressive Rear Spring enhances cornering, reduces braking distance, and improves overall bike balance and feedback, fitting onto the original shock for easy installation.