3-layer structure with aluminum core and two stainless steel outer layers reduces rotor surface temperature approximately 100 degrees Celsius compared to all-steel rotors
Includes standard type rotor lockring
Requires SM-HB20 external-type rotor lockring when installing onto 15/20mm axle hub, see BR8088
Shimano XT RT81 Centerlock Disc Rotors
Item Dimension : 2.56 x 2.95 x 2.95 Cm
Package Weight : 0.16 Kg
Model No. : ISMRT81SS
Availability : Available (Usually ships in 4-8 business days)