Shimano SM-MA-R160P/S Disc Brake Adapter – IS to POST Mount for 160 mm Rotor

Shimano SM-MA-R160P/S Disc Brake Adapter – IS to POST Mount for 160 mm Rotor

Convert your bike’s IS (International Standard) rear mount to properly accommodate a 160 mm post-mount caliper using the Shimano SM‑MA‑R160P/S adapter. Crafted from black anodized aluminum, this durable adapter ensures precise caliper spacing without compromising stiffness or alignment. Includes all necessary mounting hardware and is built to fit cleanly and securely. Precision-engineered in Japan, it delivers repeatable performance and reliability.


Key Features
• Converts 74 mm IS mount to post-mount caliper for 160 mm rotors
• Made from durable black anodized aluminum; lightweight yet strong 
• Includes necessary mounting hardware for quick, tool-based installation 
• Engineered and manufactured in Shimano’s Japan facilities for reliable quality 
• Compatible with most rear IS frames needing upgrade to 160 mm post-mount braking systems