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Shimano RT-MT900-M brake disc rotor, 180 mm, Center Lock inner lockring, Ice Tech. Freeza

73.99 €
RRP 92.99 €
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From 27.01.2026 (Tuesday) Check availability
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Delivery method on Wednesday 28.01.2026
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Delivery method on Wednesday 28.01.2026
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The design of the Shimano XTR RT-MT900 disc brake rotors is a further development of the successful ICE TECHNOLOGIES FREEZA design. While the further weight reduction of 5g and 10g is particularly attractive for the 140mm and 160mm discs, the 180mm and 203mm versions are characterised by a further improvement in heat dissipation of 20°C in intensive tests and are also pleasantly low-weight (203mm: minus 30g).

Features - XTR RT-MT900 Center-Lock Disc Rotor

  • 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

Product features

  • Use: MTB
  • Group: XTR M9100
  • Model: RT-MT900
  • Disc mount: Center-Lock
  • Pad compatibility: Metal / Resin

Diameter (choose variant)

  • 140mm (RT-MT900-SS)
  • 160mm (RT-MT900-S)
  • 180mm (RT-MT900-M)
  • 203mm (RT-MT900-L)

Material

  • Rotor: Stainless steel / Aluminum
  • Lockring: Aluminum

Weight

  • 90g - 140mm (manufacturer information)
  • 108g - 160mm (manufacturer information)
  • 133g - 180mm (manufacturer information)
  • 149g - 203mm (manufacturer information)

Scope of delivery

  • 1 Shimano XTR RT-MT900 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.

XTR M9100

First ride impression XTR M9100

Product features
New Ice Technologies Freeza rotor construction
20°C lower temperature on rotor surface vs. SMRT99-203mm
Technologies used: Ice Technologies Freeza, Center Lock
Product details
Diameter 180 mm
Disc mount Centerlock
Weight 132 g
Material aluminium, steel
product ID 74896
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Shimano
Brake discs Shimano
Japanese manufacturer produces road, mountain, gravel, trekking, BMX and e-bike groupsets. They also offer a whole series of components and apparel. Their range goes from wheels, footwear, eyewear to backpacks. Shimano is a traditional manufacturer known for their quality work, which is why they are the favourite choice of amateurs and professionals.
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