Shimano SM-RT900 Rotor Disc Brake 140mm With Lock Ring

Overview

The Shimano SM-RT900 is a premium 140mm disc brake rotor engineered for maximum stopping power and heat management on mountain bikes. Featuring ICE TECHNOLOGIES FREEZA construction with advanced heat dissipation coating, this rotor delivers consistent braking performance across aggressive riding and extended downhill sections.

Key Features

• ICE TECHNOLOGIES FREEZA Construction — Advanced rotor design with high heat dissipation paint coating; maintains consistent braking performance during extended or aggressive braking by rapidly cooling rotor surface
• Superior Heat Dissipation — Specialized thermal management technology prevents rotor fade and maintains stopping power on long downhill stretches and sustained braking efforts
• High-Performance Braking — Optimized rotor geometry and surface finish deliver superb stopping power and consistent modulation across varied terrain and weather conditions
• Stable Performance — Engineered for versatile, reliable braking in the most demanding mountain biking conditions; resists warping and maintains concentricity under load
• CENTER LOCK Mounting with Lock Ring — Quick-connect spine mount with integrated lock ring design enables tool-free rotor installation and removal; simplifies wheel changes and maintenance
• 140mm Diameter — Standard rotor size suitable for most trail and enduro riding; balances stopping power with minimal weight and aerodynamic drag
• XTR Series Premium Engineering — Top-tier Shimano component tuned for competitive mountain biking and aggressive trail performance

Technical Specifications

• Rotor size: 140mm diameter
• Mounting system: Shimano Center Lock (spine mount with lock ring)
• Construction: ICE TECHNOLOGIES FREEZA
• Thermal coating: High heat dissipation paint
• Lock ring: Included
• Series: Shimano XTR (premium top-tier)
• Compatibility: Center Lock compatible hubs only
• Application: Mountain biking, trail, enduro

Compatibility & Ideal Use Cases

Compatible exclusively with Shimano Center Lock disc brake hubs; not compatible with ISO-mount or 6-bolt systems. Designed primarily for mountain biking, not BMX use. Ideal for trail, enduro, and aggressive mountain bikers demanding maximum stopping power and heat management on technical terrain and extended descents. The ICE TECHNOLOGIES FREEZA coating makes this rotor well-suited for riders in wet climates or those experiencing brake fade on long downhill sections. The quick-connect Center Lock design with included lock ring simplifies maintenance and wheel changes during races or extended rides. The 140mm size provides ample stopping power for most trail applications without excessive weight. Premium pricing reflects advanced thermal technology and professional-grade Shimano engineering. Recommended for serious mountain bikers prioritizing performance and reliability in demanding conditions.