![How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from](https://i.redd.it/k3tre6cqu2g81.jpg)
How do I know which one is genuine on SM-RT66 rotors? One says made in China (SK) while other says Japan (RA). Both has different edges. Please confirm. Got china one from
![SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/51F5masm3zL._AC_UF1000,1000_QL80_.jpg)
SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs
![SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/41sx9QjtzFL._AC_.jpg)
SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs
![SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs SHIMANO SM-RT66 Disque de Frein pour Freins 6 Trous Argent Argent Diamètre 160 mm & Adaptador Freno Disco 180mm-SM-MA-F180 Post/Standard Noir Taille Unique : Amazon.fr: Sports et Loisirs](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/716jTkKeoeL._AC_UF350,350_QL80_.jpg)