Convert you front caliper mount to 180mm.
Shimano Disc Brake Mount Adapter - SM-MA-F180P/P2 - PM to PM - 180mm
140/160/180mm Bike Brake IS/PM Adapter MTB Road Mountain Bicycle fit Shimano UK
BUCKLOS IS/PM 180mm 203mm Post Mount Rotor MTB Bike Disc Brake Caliper Adapter
Shimano XT 180mm Disc Brake Rotor SM-RT86 Ice Tec 6 Bolt MTB Bike
Shimano Deore SM RT56 Brake Disc 6 Bolt Mountain Bike 180Mm MTB Rotor
NEW Shimano Deore SM-RT56 6-Bolt Bike Disc Brake Rotor 160mm 180mm MTB Road Bike
