Brake Disc Shimano Sm-Rt 66 New 180 Or 203 MM 6 Hole Original Screws | eBay
Shimano SM-RT66 Disc Rotor - 203mm, 6-Bolt
Shimano SM-RT 66 Brake Disc S M L Ø 160 180 7.99in 6-Loch Deore XT Slx Zee XTR | eBay
6-Bolt Disc Brake Rotor 220/203/180/160 mm | SHIMANO BIKE-EU
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