ULTSPEED BRAKE ROTORS FOR EBIKE High quality 410/420 stainless steel offers optimal breaking power Rotors are designed and matched to wheel styles for a complete custom-look OD: 203/220/240/260mm Nano-blue electroplated rivets for floating rotor available Galvanized carbon steel bolts or titanium alloy bolts optional Grind finish High strength 7075 aviation aluminium alloy center floating rotor brings LIGHTEST floating rotor and colorful choice High quality Spring Washer supply STEADY floating performance and long life Supply OEM Services, customized designs and options. Professional installation recommended SHOP NOW