Shimano RT-MT800 Center Lock Brake Rotor for XT / Ultegra Internal Serration

Item number: 71448
RT-MT800 Center Lock Brake Rotor for XT / Ultegra Internal Serration - silver-black/180 mm
RT-MT800 Center Lock Brake Rotor for XT / Ultegra Internal Serration - silver-black/180 mm
RT-MT800 Center Lock Brake Rotor for XT / Ultegra Internal Serration - silver-black/180 mm
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.91 / 5.00

The RT-MT800 brake rotor by Shimano stands for perfect heat dissipation

The Shimano RT-MT800 Internal Serration brake rotor uses Ice Technologies FREEZA heat dissipation to further reduce temperatures, resulting in more consistent braking performance. The life of the brake pads is also extended. The RT-MT800's proven sandwich construction with an aluminium core between two layers of stainless steel ensures efficient heat dissipation via the integrated radiation fins.

Technical Information:

Mount: Center Lock
Diameter: 140 mm, 160 mm, 180 mm, 203 mm
Design: 2-piece
Rotor Material: stainless steel outer and aluminium core sandwich construction
Spider Material: Aluminium
Lockring Material: Aluminium

Approved For:

Brake Compatibility: BR-M9100*, BR-M9120, BR-M9110-R**, 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-R9270**, BR-R9170*, BR-R8170*, BR-R8070*, 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 (BR-R9170-R also not compatible with 180 mm)
** only 160 mm
*** with BR-S700 and BR-S7000 only organic


- great heat dissipation due to innovative design
- reduced fading
- easy installation with Spline Mount and lockring
- version with internal toothing
- painted spider, polished rotor, anodised lockring

Note: For 15 mm and 20 mm front thru axle hubs, the SM-HB20 lockring must be used.


Ice Tech FREEZA brake rotors show even less fading due to 40° C less heat development compared to SM-RT98. The three-layer sandwich construction consists of stainless steel flanks and an aluminium core with integrated cooling fins. The two-part structure with the aluminium spider dissipates the heat well. The dirt-repellent design extends the service life of the rotor and pads. A real eye-catcher is the sporty, aggressive high-tech design.

Manufacturer Numbers:

140 mm: I-RTMT800SSI
160 mm: I-RTMT800SI
180 mm: I-RTMT800MI
203 mm: I-RTMT800LI


- 1 x Shimano RT-MT800 brake rotor
- 1 x lockring


  • silver-black/140 mm: 88 g
  • silver-black/160 mm: 109 g
  • silver-black/180 mm: 132 g
  • silver-black/203 mm: 164 g


  • silver-black/140 mm, in stock
  • silver-black/160 mm, in stock
  • silver-black/180 mm, in stock
  • silver-black/203 mm, in stock

Customer Reviews (5)


Customer Reviews (5)


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by Jesús D.  on 07.04.2022
verified purchase

El producto llegó rapidísimo y en perfecto estado

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by Manuel C.  on 25.03.2022
verified purchase

Excelentes discos!

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by Christian W.  on 21.05.2020 (modified on 27.01.2021)

Sehr gute Bremsscheibe. Zusammen mit G03A Belägen lautloses Bremsen.

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by Sigrun B.  on 02.04.2020
verified purchase

wie erwartet gute brems kraft einfach super

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by Sebastian R.  on 17.02.2020

Top Bremsscheibe. Gleiches Gewicht wie die XTR Scheibe, aber leichter als die Dura-Ace Scheiben. Verziehen sich ein bisschen wenn sie warm werden, aber noch im Rahmen

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