40% stiffer shock springs?

[altern8]

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGCD9&P=X

Like those, are they suppose to be better than the stock ones??
if yes, what are they suppse to improve?
thanks for answers.
Kris

 

[NCNitro]

Which stock springs are they stiffer than? The .21 rtr, or the SS and .25 rtr? They both had different springs, the .21 are softer than the SS and .25 rtr, these are both the same just a different color.

 

[tomoracle290]

basicaly you might notice if you put your truck on the ground and press it down, that when you let go the shocks will not go back to there full size, therefor not giving you your full travel. so these will give you more travel and stop your truck getting as meny shocks.
I have got ones like them and they do make a bit of a diffrence