green are soft tan are medium soft and black are hard i run tan on the front and i used to run black on the rear but changed them to blue of the mini summit and dont forget to change the shock oil standard shocks use 30 so if you want a bit stiffer up it to about 45/50 i use 40 in the front and 50 in the rear but it all depends on what your driving on but thats a good allround set up