Shimano SM-RT81-SS Disc Brake Rotor
Best high performance upgrade for serious road and mountain bikers.
This rotor is built for riders who prioritize thermal stability over everything else. The clever three-layer construction aggressively sheds heat to prevent brake fade on long descents, though the specialized design is strictly for those running Centerlock hubs. It’s a set-it-and-forget-it upgrade for consistent, quiet stopping power in any weather.
$86.99
Who it's for
- Mountain bikers tackling steep terrain and long downhill sections
- Home mechanics looking for a fast and reliable setup process
- Performance-oriented riders who prioritize precise control and safety
Who should skip it
- Cyclists with traditional 6-bolt hubs who want to avoid adapters
- Budget-conscious commuters seeking a simple and low-cost replacement
- Minimalist travelers who prefer tools already in their basic kit
Performance breakdown
Thermal Management
Ice Technologies construction effectively dissipates heat during long, aggressive descents.
Stopping Consistency
Reliable bite and modulation remain stable even under heavy braking loads.
Installation Ease
Centerlock mounting system makes rotor swaps quick and remarkably straightforward.
All-Weather Reliability
Specialized profile sheds mud efficiently to maintain grip in adverse conditions.
Pad Longevity
Advanced heat dissipation reduces premature wear on your brake pads.
Structural Durability
Three-layer sandwich design balances lightweight performance with robust, long-term resilience.
Key Specs
Diameter
203mm
Material
Stainless steel/aluminum/stainless steel 3-layer sandwich
Weight
133g
Mounting Type
Centerlock
Pad Compatibility
Resin and Metallic Pads
Cooling Technology
Ice-Tech
Compatible Brake System
Shimano
Rotor Shape
Round
E-bike Rated
No
Lockring Included
No
Know before you buy
Still have a question?
Ask Metto anything about the Shimano SM-RT81-SS Disc Brake Rotor before you decide.
