Cone Springs???

[OrangeD]

Your advice please!
I've got some red spot cone spring for the front of the mini i'm building but i'm confused about the rear, I was dibating putting standard cone springs on the rear, as the red spots only seem to come in one spring rate, surely this can not be right, because the front end has got to have a lot more weight than the rear, thus needing different sping rate, please enlighten me.
Regards
Orange