PRO-LINE DUAL RATE SPRING ASSORTMENT FOR TRAXXAS X-MAXXDo you want to add more performance, style and function to your X MAXX shocks? Then Pro Line has the ultimate Spring solution for you! Pro Line is proud to introduce fully functional Dual Rate Springs specifically developed for your X MAXX. The spring assortment pack includes a pair each of Soft (Green), Medium (Yellow) and Firm (Red) Upper and Lower springs that can be mixed and matched to give you tons of tuning options. The main benefit of using