Meet our 18" Floating Rotor

Stainless Steel Rotors

Our stainless steel rotors are made from 420 stainless steel.  Some of our competitors  prefer 410, but we elected to use 420 stainless steel because it's stronger.  It is a higher carbon version of types 410 and 416 stainless that can be hardened by heat treatment.


Its best corrosion resistance is achieved when 420 is hardened and surface ground or polished. In the hardened condition, 420 has good corrosion resistance to the atmosphere, foods, fresh water, mild alkalies and acids, steam, sterilizing solutions, crude oil, gasoline, and other similar corrosive media.


Our rotors are heat-treated to 33° - 36° +3/-3 and are satin finished.


The higher carbon content employed in 420 gives higher strength and hardness over stainless grades 410 and 416.



We offer five sizes in the one piece format:



11.8" 5mm

11.8" 7mm





Thickness: Flat within .001"


11-1/2" Vented .204" • Non-Vented .199"

11.8" 5mm Vented .196" • Non-Vented .196"

11.8" 7mm Vented .250" • Non-Vented .250"

13" Vented .201" • Non-Vented .206"

16" Non-Vented .199"


Center Bores


11-1/2" • 13" • 16" - 1.995"

11.8" 5mm & 7mm - 2.220"


This two piece rotor is made up from a 420 stainless steel outer ring which is heat-treated two different times to produce  the stopping power you want.  The carrier is manufactured from 6061-T6 prime aluminum.


We've put the center bore in, but we left out the button holes.


The stainless steel buttons have been redesigned to give it the cleaner look, but still do the job.


Each floating rotor includes:

  • Stainless Steel Outer
  • Aluminum Carrier (inner)
  • 10 Buttons, 10 washers and 10 clips


Replacement Buttons with clip & washers are available individually.


Note:  This rotor works well with Metalsport's HP Brake Caliper.

MSI Inc.

9830 Miller Way

South Gate, CA 90280

Tel  562.583.4530

Fax 562.928.9276


Office Hours:

Monday - Friday

7am to 4pm PST