ECS vs. Girodisc replacement rotors

[SAMM3Y]

Stoptech trophy uses full floating, street kits do not.

[pbonsalb]

Originally Posted by Bartledoo

Not sure. On full floating rotors with traditional fasteners (PFC rear V2 rotors without belleville washers, for example) you can move the friction ring axially by hand, while the hat remains stationary. It will clink against the hat when you move it back and forth.

I have the regular non-Trophy set and my rotors are fixed to the hats and cannot be moved by hand. That is probably why the Trophy are recommended for racing. I have the hard parker version.