Shimano Dura-Ace SM-RT900 Lock Ring
Best essential component for high performance road cyclists.
A critical small part that ensures your disc brake rotor stays locked to the hub. It provides the necessary security for high-performance braking, preventing movement and ensuring consistent stopping power.
$14.38
at
Bicycle Addiction
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Who it's for
- Cyclists prioritizing unwavering braking reliability and rotor stability.
- Riders seeking long-lasting components for their high-performance road bikes.
- Weight-conscious athletes and competitive riders optimizing bike mass.
Who should skip it
- Budget-conscious cyclists looking for functional, less expensive alternatives.
- Home mechanics without specialized tools for high-end bike components.
- Casual riders who won't notice the subtle performance advantages.
Performance breakdown
Locking Security
Center Lock interface ensures a rock-solid, vibration-free rotor connection.
Installation Ease
Standard spline design makes mounting and removal quick and intuitive.
Build Integrity
Premium materials withstand the intense heat and torque of professional braking.
System Compatibility
Perfectly optimized for Dura-Ace ecosystems but works across most Center Lock hubs.
Weight Efficiency
Minimalist design keeps rotating mass low without sacrificing structural strength.
Reliability Under Load
Maintains consistent rotor alignment even during aggressive, high-speed descents.
Key Specs
Mounting Type
Center Lock
Torque Specification
40 Nm
Compatibility
SM-RT900 Disc Brake Rotors
Axle Compatibility
12mm thru axle, Quick Release
Tool Compatibility
Cassette/Rotor Lockring Tool
Quantity Per Pack
1
Bike Type Compatibility
Road Bike, Mountain Bike
Component Application Area
Brake System
Compatible Brand
Shimano
Finish Type
Silver
Know before you buy
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