Description
Rear stock springs for the ZX5 and RB5. These are considered soft springs. The number for the spring refers to the spring rate. The lower the number, the softer the spring. These are the stock springs that come with the RB5 kit.
Here is a Kyosho Spring Chart: Part # Color Description KYOW5183-03 Black #50 Ultra Soft KYOW5183-60 Dark Yellow #60 Very Soft KYOW5183-65 Light Yellow #65 Soft KYOW5183-68 Blue #68 Medium KYOW5183-04 Silver #70 Hard KYOW5183-72 Cobalt Blue #72 Very Hard KYOW5183-75 Light Green #75 Extra Hard KYOW5183-80 Green #80 Ultra Hard