Upgraded my SHIMANO ROTOR 160mm to 203mm with SHIMANO F203P/P DISC BRAKE ADAPTOR - YouTube
Disc Brake Rotor Adapter (6-bolt rotor to CENTER LOCK hub) | SHIMANO BIKE-EU
Shimano 160mm 180mm Brake Rotor Disc Brake Adapter Front Rear Brake Caliper Base Adapter Bike B Post Mount Adapter 51mm A Post - Bicycle Brake - AliExpress
Shimano Front 203mm P/P Disc Brake Adapter - TBS Bike Parts
Shimano Road Bike Disc Brake Post Mount Caliper On Flat Mount Frame Fork Adapter - Bicycle Brake - AliExpress
Shimano CL To 6B Disc Brake Adapter, Black | Bikeinn
Shimano SM-MA Disc Brake Mount Adapters | Bikecomponents.ca
Shimano SM-MA Caliper Adapter - Postmount to Postmount Brake | + 20/43 mm
Shimano Disc Brake Adapter Front Post to IS | New Era Cycle