These are not normal T-Drive rotors. These rotors are designed for use with "Narrowband" compatible calipers. Damage may occur if you attempt to use these rotors with calipers not compatible with "Narrowband" rotors.
Specifications
320mm x 6.75mm Disc (All Models)
THIS IS NOT A NORMAL T-Drive Rotor
Used Extensively in World Superbike
Price is for a Pair of Rotors
To be Used With Calipers Compatible with 30mm Height Rotors