Originally Posted by yyhayyim

THanks for the info...now, what about the HPI/HB Cyclone springs. I'm looking at a 2005 Asphalt-rubber tire, med traction, Hara set-up sheet. It says he used HPI blue springs in rear...I have looked in HPI website and towerhobbies, but this rating or name doesn't appear. Towerhobbies has the PRO4 spring set, but they have 2 gold, 2 silver, and the rest are black. What and where are the HPI blue? Is HPI blue just a rating, instead of the actual color of the spring(Xray and Associated have their springs color coated). Asked at local hobby shop and they have boxes of HPI springs for TC, some are green, blue, white, orange, etc...are these the ones? Can someone please explain the HPI/HB color/spring rating system and where to get the HPI "blue" rated springs?