Kool-Stop says the red and other non salmon or black colors are "semi-aggressive". How much of a diff that is to the salmon, I don't know. Probably can't hurt to try them. If they are even half as good as the salmon they get a from me. I'm currently using the salmon on my Ridley and wonder why I have gone so long without them...

Arg. Forgot the website link: http://www.koolstop.com/english/compounds.html