Shimano RT-MT905 6-bolt Brake Rotor for XTR

Item number: 84843
RT-MT905 6-bolt Brake Rotor for XTR - black-silver/180 mm
RT-MT905 6-bolt Brake Rotor for XTR - black-silver/180 mm
RT-MT905 6-bolt Brake Rotor for XTR - black-silver/203 mm
RT-MT905 6-bolt Brake Rotor for XTR - black-silver/203 mm
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.91 / 5.00

The Shimano XTR RT-MT905 Brake Rotor - Ice-Tech FREEZA for 6-bolt disc brakes

The RT-MT905 is Shimano's first 6-bolt brake ritir with Ice-Tech FREEZA technology. The proven sandwich construction with aluminium core and stainless steel jacket is supplemented by a specially-coated rib structure in the aluminium, which ensures even faster heat dissipation. This means you can rely on constant braking power even in extreme use. Thanks to the surface temperature being lowered by at least 100 degrees compared to conventional stainless steel brake rotors, fading and brake noise are reduced and the service life of the brake pads is also extended. RT-MT905 was developed for XTR brake systems, but is also compatible with numerous other models from the MTB, gravel and road bike segments.

Guidelines for Replacing E-bike Components:

Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance.

Technical Information:

Mount: 6-bolt
Diameter: 180 mm, 203 mm
Design: 2-piece
Rotor Material: stainless steel outer and aluminium core sandwich construction
Spider Material: Aluminium

Approved For:

Brake Compatibility: BR-M9100*, BR-M9120, BR-M9000, BR-M9020, BR-M8100, BR-M8120, BR-M8110-R*, BR-M8000, BR-M8020, BR-M7100, BR-M7120, BR-M7110-R*, BR-M7000, BR-M6100, BR-M6120, BR-M6000, BR-MT520, BR-MT420, BR-M820, BR-M640, BR-S7000, BR-S700, BR-R9170-F*, BR-R8170*, BR-R8070*, BR-R7170*, BR-R7070*, BR-4770*, BR-RS805*, BR-R785*, BR-RS785*, BR-RS505*, BR-RS405*, BR-RX810*, BR-RX400*
Brake Pad Compatibility: sintered**, organic

* not compatible with 203 mm
** with BR-S700 and BR-S7000 only organic


- FREEZA Ice Technology and sandwich construction for even faster heat dissipation
- superior braking performance, durability and control even in the most demanding riding conditions
- significantly lower surface temperature for higher performance and less fading with less brake noise and longer pad life
- for brake pads with narrow pad shape
- anodised spider, polished rotor
- with self-locking plates


Shimano Ice Technologies provide a fast heat dissipation at your disc brake. The brake pads are equipped with aluminium cooling fins. The brake rotor is constructed using a sandwich technique in which stainless steel encloses an aluminium core. The stainless steel on both flanks ensures long durability, the aluminium allows heat dissipation. FREEZA is the further development of the brake rotor, in which additional, specially coated ribs in the aluminium of the rotor ensure even better heat compensation. This cooling technology creates consistently high performance and longer brake pad durability while reducing fading and brake noise.

Manufacturer Numbers:

180 mm: I-RTMT905M
203 mm: I-RTMT905L


- 1 x Shimano RT-MT905 brake rotor
- 6 x Shimano fastening bolts
- 3 x Shimano safety plates


  • black-silver/180 mm: 147 g
  • black-silver/203 mm: 187 g


  • black-silver/180 mm, out of stock
  • black-silver/203 mm, in stock

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