Shimano Disc Rotors

Shimano rotors are engineered to deliver smooth, reliable, and consistent braking across road, gravel, mountain, and e-bike applications. They’re built with Shimano’s Ice-Tech and Ice-Tech Freeza heat-dissipation technologies to keep brakes cool and powerful even on long descents.

Shimano RT‑CL900 Disc Brake Rotor – Top-tier Dura-Ace-level rotors with Ice-Tech Freeza for excellent heat dissipation, reduced fade, and quiet performance — ideal for high-speed road and gravel rides.

Shimano RT‑CL800 Disc Brake Rotor – Great Ultegra-spec rotor designed for road, gravel, and MTB. Ice-Tech Freeza laminated design improves braking durability while keeping weight low.

Shimano RT‑MT900 Center Lock Disc Rotor – Premium XTR/High-End MTB-grade rotor balancing light weight with heat-managing Ice-Tech design — great for aggressive trail braking and sustained descents.

Shimano RT‑MT800 Ice‑Tech Rotor – Excellent value XT-level Ice-Tech rotor with solid stopping power and heat control — perfect for trails and all-around MTB riding.

Shimano RT‑EM910 Disc Brake Rotor – Designed for e-bikes/Sensor-integrated setups (e-bike speed sensor compatible) with Ice-Tech cooling — ideal for heavier bikes and long technical rides.

Rotor Sets

• Shimano CL900 Center Lock Disc Rotors (Pair) – Pair of high-end road rotors ready for dual installation.
• Shimano RT‑CL800 Centre Lock Rotors (Pair) – Ultegra-spec pair, great for road or gravel builds.
• Shimano RT‑MT900 Ice‑Tech Center Lock Rotors (Pair) – MTB-focused pair with advanced cooling.

Why Shimano Rotors Are Great

Advanced Heat Management

Many Shimano rotors use Ice-Tech or Ice-Tech Freeza laminated construction — stainless steel + aluminum + stainless steel layers — to pull heat away from the braking surface for more consistent performance, less brake fade, and longer pad life.

Rotor Types & What They’re For

RT-CL900 & RT-CL800 — Premium Road & Gravel Rotors

• RT-CL900 – Top-end Dura-Ace level with Ice-Tech Freeza for road and high-speed gravel rides.
• RT-CL800 – Ultegra spec with excellent cooling and broad compatibility.
  ✔ Best for riders who want quiet, refined modulation with strong heat resistance on long climbs and descents.

Who should buy: Road racers, endurance cyclists, gravel riders, and commuters upgrading from stock rotors.

RT-MT900 & RT-MT800 — Mountain Bike Performance Rotors

• RT-MT900 – Light and heat-managed rotor ideal for aggressive trail and enduro riding.
• RT-MT800 – Great value rotor with Ice-Tech cooling — strong stopping performance for trail and all-mountain use.
  ✔ Designed for wider MTB rotor sizes (160mm, 180mm, 203mm) and handling sustained braking on technical terrain.

Who should buy: Mountain bikers, trail riders, and anyone tackling steep terrain or long descents.

RT-EM910 – e-Bike & Sensor-Compatible Rotor

• Built with integrated e-bike speed sensor support, offering real-time speed feedback while delivering consistent braking.
  ✔ Excellent choice for e-bike riders who want compatible brake rotors that play nice with modern e-bike electronics.

Who should buy: e-bike riders, commuters, and tech-savvy cyclists wanting integrated performance.

Rotor Size Guide & Fitment

Shimano rotors come in multiple diameters — typically 140mm, 160mm, 180mm, and 203mm. Larger rotors provide greater leverage and better heat dissipation, while smaller ones save weight and suit lighter riders or front/rear balance setups.

Mounting Types:
✔ Center Lock — quick spline mount with lockring.
✔ 6-Bolt — classic bolt-on style (available on some models or with adapters).

Compatibility Tip: Make sure your hubs and calipers support the rotor size and mount type you choose.

Who Should Use Shimano Rotors

• Road Cyclists & Endurance Riders – high-end CL900/CL800 rotors offer refined modulation and cool braking on long rides.
• Gravel & All-Road Riders – CL800 and MT series rotors give versatility across mixed surfaces.
• Mountain Bikers – MT900/MT800 are tuned for aggressive braking on trail and technical descents.
• e-Bike Users – the EM910 is a great match for e-bike systems with sensor integration.