The Shimano RT-EM300 combines a 180-mm brake rotor with the magnet required for speed detection in compatible Shimano e-bike systems. The magnet is integrated directly into the brake rotor, so no separate magnet needs to be installed on the rotor.
Installation is via the proven Center Lock mount and the included lockring. The RT-EM300 is designed exclusively for resin brake pads and is suitable for compatible e-bike hubs and Shimano speed sensors designed for this type of brake rotor.
Top features at a glance:
- Integrated magnet for Shimano e-bike speed sensors
- 180 mm Center Lock for compatible e-bike hubs
- Resin version, including lockring for direct installation
Technical specifications:
- Manufacturer: Shimano
- Model: RT-EM300
- Version: RT-EM300-M / 180 mm
- Product type: Brake rotor
- Diameter: 180 mm
- Mount: Center Lock
- Rotor material: Stainless steel
- Adapter material: Steel
- Brake pad compatibility: Resin
- Magnet: integrated into the brake rotor
Compatible with:
- Center Lock hubs for 180 mm brake rotors
- Shimano e-bike systems that use a speed sensor such as EW-SS301 or SM-DUE11 in conjunction with a magnet on the brake rotor
- Resin brake pads
Scope of delivery:
- 1x Shimano RT-EM300 brake rotor, 180 mm
- 1x lockring
- Delivered in workshop packaging - securely packaged, without the original packaging
Model ID: RT-EM300 | Manufacturer part no.: ERTEM300M | EAN: 4550170443153
Center Lock brake rotor with an integrated sensor magnet for compatible Shimano e-bike systems.
SKU: L2E1
Shimano RT-EM300 brake rotor | 180 mm | Center Lock | E-Bike | incl. lockring with magnet
The Shimano RT-EM300 combines a 180-mm brake rotor with the magnet required for speed detection in compatible Shimano e-bike systems. The magnet is integrated directly into the brake rotor, so no separate magnet needs to be installed on the rotor.
Installation is via the proven Center Lock mount and the included lockring. The RT-EM300 is designed exclusively for resin brake pads and is suitable for compatible e-bike hubs and Shimano speed sensors designed for this type of brake rotor.
Top features at a glance:
- Integrated magnet for Shimano e-bike speed sensors
- 180 mm Center Lock for compatible e-bike hubs
- Resin version, including lockring for direct installation
Technical specifications:
- Manufacturer: Shimano
- Model: RT-EM300
- Version: RT-EM300-M / 180 mm
- Product type: Brake rotor
- Diameter: 180 mm
- Mount: Center Lock
- Rotor material: Stainless steel
- Adapter material: Steel
- Brake pad compatibility: Resin
- Magnet: integrated into the brake rotor
Compatible with:
- Center Lock hubs for 180 mm brake rotors
- Shimano e-bike systems that use a speed sensor such as EW-SS301 or SM-DUE11 in conjunction with a magnet on the brake rotor
- Resin brake pads
Scope of delivery:
- 1x Shimano RT-EM300 brake rotor, 180 mm
- 1x lockring
- Delivered in workshop packaging - securely packaged, without the original packaging
Model ID: RT-EM300 | Manufacturer part no.: ERTEM300M | EAN: 4550170443153
Center Lock brake rotor with an integrated sensor magnet for compatible Shimano e-bike systems.
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Shimano Europe B.V. distributes Shimano bicycle components and accessories, including drivetrains, brakes, pedals, wheelsets, shoes, and cycling apparel. The brand is known worldwide for reliable technology, precise shifting performance, and durable products for road bikes, mountain bikes, gravel bikes, e-bikes, and everyday bicycles.
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