StopTech Racing .810" floating rotors are available slotted or plain with a curved vane directional or pillar vane non-directional design. These are some of the lightest on the market weighing in at just under 6lbs and 8lbs, respectively.
The oval-shaped mounting holes on the rotors are designed to work with StopTech aluminum rotor adapter plates and floating pin hardware kits. These rotors also work when mounted directly to the hubs, but they will not float without the adapter plates and pin hardware.
See Rotor Hardware option in the product menu for floating rotor adapters and pin hardware kits.