203mm x 1.8mm Size: Talaria Sting are 203mm diameter Rotors from the factory.
Talaria Sting are 203mm front and rear rotor sizes from the factory ( the MX4 is 220mm ) .
The 203mm Rotor does not need a caliper bracket and is one piece 1.8mm thick rotor same as factory thickness.
220mm x 1.8 Size: This is an upgraded oversized rotor that provides additional braking force. A perfect upgrade if you're a hard rider and pushing the limits of your current 203mm rotors.
1.8mm Thickness one piece design.
This 220mm rotor you will need a caliper adapter bracket to space the caliper out for the bigger rotor.
220mm x 2.3mm Floating Size: This is a beast of a rotor and a serious upgrade that provides the best braking possible. A perfect upgrade if your running bigger/heavier wheels and insane power output.
2.3mm, 2 piece designs helps with heat cycling which is major reason rotors warp. The 2 piece design helps stop that from happening
This 220mm rotor you will need a caliper adapter bracket to space the brake caliper out for the bigger rotor.