don't know the spring rate, must check on box (if mentioned) however I think you can choose it according to your weight. Springs are linear (no progressive) and here is a quote from "andreani group official website" - "
This item is set up and adjusted by Andreani technical staff according to your driving requirements. Once added the item to the cart, you will be able to set the adjustment parameters" therefore I think once you buy through a dealer, you can pass your requirements
adjustments are:
on both legs spring preload
on one leg - hydraulic compression
on other leg - hydraulic rebound
here the link to
andreani Group
fyg the price shown are VAT exluded in Italy we have 22% tax
then ask to your nearest dealer / installator