Shimano Steps RT-EM810 Disc Brake Rotor - 180mm, Center Lock, External Lockring, Rear Only with Magnet Brack | Tree Fort Bikes
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Shimano GRX SM-RT64-M Disc Brake Rotor with External Lockring - 180mm, Center Lock, Silver - Bushwhacker
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Amazon.com: SHIMANO Centerlock Bicycle Hydraulic Disc Brake Rotor - SM-RT54- 180MM - ESMRT54ME : Sports & Outdoors
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