The design of the Shimano XT / Ultegra / GRX RT-MT800 disc brake rotors is a further development of the successful ICE TECHNOLOGIES FREEZA design.
Features – Shimano XT / Ultegra / GRX Center-Lock Disc Rotor RT-MT800
- Stable and versatile brake performance in the most demanding conditions
- High-performance and consistent brake performance
- New ICE TECHNOLOGIES FREEZA construction for boosting heat dissipation
- 140mm and 160mm optimal for Road / Gravel
- Lockring type with internal (Internal Serration) or external (External Serration) toothing
Product features
- Use: MTB, Road, Gravel
- Group:Â XT, Ultegra, GRX
- Model:Â RT-MT800
- Disc mount: Center-Lock
- Pad compatibility: Metal / Resin (with BR-S700 and BR-S7000 Resin only!)
Diameter (choose variant)
- 140mm intern (RT-MT800-SSI)
- 140mm extern (RT-MT800-SSE)
- 160mm intern (RT-MT800-SI)
- 160mm extern (RT-MT800-SE)
- 180mm intern (RT-MT800-MI)
- 180mm extern (RT-MT800-ME)
- 203mm intern (RT-MT800-LI)
- 203mm extern (RT-MT800-LE)
Lockring type with internal or external tool holder!
Compatibility – Brake Caliper
- 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*
* not compatible with 203mm
** only compatible with 140mm and 160mm
Material
- Rotor: Stainless steel / Aluminum
- Lockring: Aluminum
Weight (manufacturer information)
- 121g (140mm)
- 133g (160mm)
- 159g (180mm)
- 193g (203mm)
Scope of delivery
- 1 x Shimano RT-MT800 Center-Lock Disc Rotor incl. Lockring
Technologies
Ice-Tech FREEZA
SHIMANO’s ICE TECHNOLOGIES has realized the ultimate clad rotor, incorporating aluminum fins for enhanced heat control. With an increased surface area for heat dispersion, the rotor achieves a 50°C reduction in heat. This in turn generates a 20% increase in braking force durability and a 20% longer pad life.
Center-Lock System
The CENTER LOCK system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.





















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