Shimano XTR RT-MT905 Disc Brake Rotor - 180mm | 6-Bolt

Shimano XTR RT-MT905 Disc Brake Rotor - 180mm | 6-Bolt Shimano

Shimano XTR RT-MT905 Disc Brake Rotor - 180mm | 6-Bolt

Shimano XTR RT-MT905 Disc Brake Rotor - 180mm | 6-Bolt

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What Sets the Shimano XTR RT-MT905 Apart from Other MTB Rotors?

The Shimano XTR RT-MT905 is the pinnacle of Shimano's disc brake rotor lineup -- a 180mm 6-bolt rotor built on ICE TECHNOLOGIES FREEZA with an additional heat dissipation paint coating that further extends the FREEZA platform's already exceptional thermal performance. Shimano rates the RT-MT905 at 100°C cooler than a 220mm standard stainless steel rotor under extreme conditions, demonstrating that the FREEZA construction and thermal paint together deliver more heat reduction in a 180mm package than a much larger conventional rotor. On the most demanding descents where braking consistency and zero fade are non-negotiable, the RT-MT905 is the highest-performing rotor Shimano makes.

The 6-bolt mounting interface is compatible with all standard ISO 6-bolt hubs, giving the RT-MT905 broader hub compatibility than center lock options while maintaining the XTR standard's exacting tolerances. The rotor arms are engineered for superior structural rigidity and minimal deformation under heat, contributing to quieter operation even after extended hard braking where other rotors begin to warp and rub. Compatible with XTR M9000 and M9100 series hydraulic disc brake systems, and cross-compatible with other Shimano MTB brake calipers. For riders who want the best Shimano rotor and are running 6-bolt hubs, the RT-MT905 is the answer.

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Specifications

  • Model: RT-MT905
  • Series: Shimano XTR
  • Size: 180mm
  • Mount: 6-Bolt (ISO)
  • Construction: ICE TECHNOLOGIES FREEZA with heat dissipation paint
  • Heat Performance: 100 degrees C cooler than 220mm standard stainless rotor under extreme conditions

FAQ

What does the heat dissipation paint on the RT-MT905 actually do?

Shimano's heat dissipation paint coating improves the rotor's emissivity -- how efficiently it radiates heat away from the surface into the surrounding air. Combined with ICE TECHNOLOGIES FREEZA's 3-layer sandwich and radiator fin construction, the paint delivers an additional thermal advantage over standard FREEZA rotors.

Is the RT-MT905 only compatible with XTR calipers?

No. Shimano disc brake rotors are broadly cross-compatible. The RT-MT905 will work with XT, SLX, Deore, and other Shimano MTB hydraulic disc brake calipers using standard 6-bolt hubs. The caliper and rotor do not need to be the same tier.

Why choose 6-bolt over center lock for an XTR build?

6-bolt has been the MTB hub standard for decades and remains widely available. Many XTR wheel builds, especially custom laced options, use 6-bolt hubs. The RT-MT905 provides XTR-tier rotor performance for these setups without requiring center lock conversion.

Best For

XC racers, enduro athletes, and serious trail riders on 6-bolt hubs running any Shimano MTB hydraulic disc brake system who want the highest-performing Shimano rotor with the most advanced heat management available.

Shimano XTR RT-MT905 Disc Brake Rotor - 180mm | 6-Bolt Reviews:

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