I did allot of reading on these, sorry don't have the links, on this site and Triumphrat forum. They work best with stock springs, not progressive springs. I bought a pair of stock springs and sold my progressives to install the intiminators. I also go a set of Works shocks built for my weight. I set the sag on the front and rear. The bike just stays "planted" mid turn, best upgrade I have done to this bike. I like it so much I did the same set up on a Harley FXR I just bought.