This is an optional Serpent Rear Shock Spring Tuning Set, and is intended for use with the Serpent S811 Cobra. This spring tuning set includes all seven sets of rear springs (gray, pink, purple, blue, green, white and yellow), allowing you to tune the rear suspension of your S811 to suit any track condition.
| Shock Spring | Characteristic |
| Softer |
|
| Stiffer |
|