Shimano, SM-RT66 Disc Rotor 180mm SLX 6-Bolt FREE shipping within Australia over AU$199.00 In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button... Shimano, SM-RT66 Disc Rotor 180mm SLX 6-Bolt FREE shipping within Australia over AU$199.00 In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button...