Originally Posted by EDWARD2003

Kyosho Plasma Ra springs.

Kyosho has just recently released some new side, kingpin and damper springs for the Ra and Plasma (F1); Purple , Blue and White. A while back, Kyosho released Yellow, Green and Red tuning springs for the Ra... I'm a little confused as to why they've released another set of springs.

More tuning options i suppose?

The only difference I can see so far is the overall thickness of the wire. The P,B,W are 0.50 mm and the Y, G, R are 0.45 mm. Does the increase in wire thickness (P,B,W) mean its a slightly harder spring rate than the (Y,G,R)?

On a side note, what is the spring rate for the kit stock spring? Medium?