The green corerc springs are 3.4....one of the reasons we switched springs was because we couldn't find out the rates of the kit ones. It probably won't be of much use but the greens are bang in the middle of the range of corerc springs, the softest being 2.8 and hardest being 4.0. I think the kit springs are mediums but I cant be of much more use i'm afraid....i'm sure Mr Helliwell will have exact rates though
Oh, the corerc springs are dual rate too so a direct comparison even with the same rate normal springs could well give different handling characteristics...but don't quote me on that!
Iain