Shimano SM-MA Brake AdaptorAdaptor to use a larger brake disc in combination with a fork or frame and a brake. The adapter can be used as follows:fork with 140 mm mount:SM-MA-F180P/P2 for the use of a 160 mm brake discfork with 160 mm mount:SM-MA-F180P/P2 for the use of a 180 mm brake discSM-MA-F203P/P for the use of a 203 mm brake discfork with 180 mm mount:SM-MA-F203P/PM for the use of a 203 mm brake discframe with 140 mm mount:SM-MA-F180P/P2 for the use of a 160 mm brake discframe with 160 mm mount:SM-MA-F180P/P2 for the use of a 180 mm brake discframe with 180 mm mount:SM-MA-F203P/PM for the use of a 203 mm brake discAdaptor to use a larger brake disc in combination with b frame and a brake. The adapter can be used as follows:frame with 160 mm mount:SM-MA-R180P/S for the use of a 180 mm brake discSM-MA-R203P/S for the use of a 203 mm brake disc