• 180mm
  • 203mm
  • 220mm
  • PR09MS / 1.8mm
  • PR09MST / 2.0mm
  • PR09MST3 / 2.3mm
  • Rotor *1 (w/ phonic wheel)
  • Made In Taiwan

Product Description

Introducing PSB's centerlock 3D FLoating Rotor.

With PSB's innovating 3D Floating technology, the brake heat degradation on rotors is no longer an issue.


※ This product does not include the sensor magnet.

Flexiblity & Rigidity

The special angle of the cut can provide support when the margin space reaches the set value along the force direction when braking. So the product strength is ensured while the floating structure restrains the high temperature deformation during braking.

Patented Elastic Disc Ribs

PR-09M possesses PSB's featured 3D Floating Technology. 6 of the 12 evenly distributed ribs have patented opening cuts. The solid ribs maintain rigidity, and the open cut design truncates the rigid structure between the ribs and the outer part of the disc. So the rotor retains flexibility after fixing to the hub.

Form Follows Function

The floating function is acheived without additional part, which means without redundant weight, the ONE-PIECE FLOATER posesses a longer service life and confronts asymmetric wear during braking more effetively comparing to conventional one-piece rotors.

Sensor Disc

The new PSB rotors with sensor discs can act as signal generators for the wheel-speed sensors, which constantly monitor the speed of both wheels. The sensor discs are essential for the ebike ABS systems.

UCI Regulations

Referring to the UCI regulations, the outermost periphery of the disc is designed to be full round edges.


  • 180 / 230g
  • PR09MS-203 / 279g
  • PR09MS-220 / 299g
  • Rotor / Stainless Steel
  • Spider / Steel
  • Sensor Disc / Aluminum
  • Center Lock

Diameter / Thickness

  140mm 160mm 180mm 203mm 220mm
1.8mm - - PR09MS-180 PR09MS-203 PR09MS-220
2.0mm - - PR09MST-180 PR09MST-203 PR09MST-220
2.3mm - - PR09MST3-180 PR09MST3-203 PR09MST3-220
  • • Please check the thickness before buying
    • For the unavailable thickness requirements, please CONTACT US

Why Choose PSB Rotors?

Find out about PSB's rotor development process. The rigorous design verification and professional road testing ensure the product quality and your riding safety.


Check Before Every Ride

Before riding your bike, please check the following items


  •  ●  Is the rotor thinner than the recommended thickness ?
     ●  Is the installation direction correct (LOGO facing outwards) ?
     ●  Are front and rear rotors cracked or deformed ?
     ●  Does the screw or lock ring reach the recommended torque value?

     ●  When removing the rotor or cleaning the bike, the rotor should not be stained with oil


※ If you have any questions, please consult the place of purchase or dealer