Shimano Mount Disc Brake Adapter for 203mm (SM-MA-R203P/S)

The Shimano SM-MA-R203P/S Disc Brake Adapter is designed to facilitate the installation of 203mm rotors on frames with International Standard (IS) mounts, paired with Post Mount calipers. Built for precision and reliability, this adapter is a must-have for riders seeking enhanced braking performance.

Seamless Adaptation for 203mm Rotors: This adapter allows for a secure and straightforward setup of 203mm rotors, providing increased stopping power and braking efficiency. It’s ideal for riders tackling steep descents or demanding trails where maximum control is essential.

Compatible with IS Mount Frames and Post Mount Calipers: The SM-MA-R203P/S is engineered to bridge the gap between IS-mounted frames (51mm) and Post Mount calipers (74mm). Its precision design ensures proper alignment for consistent and smooth braking performance.

Durable and Lightweight Construction: Constructed from high-quality materials, the adapter is both durable and lightweight. It withstands the rigors of aggressive braking while adding minimal weight to your bike.

Improved Braking Performance: By enabling the use of 203mm rotors, the adapter significantly enhances braking torque, offering quicker stops and greater modulation. This upgrade ensures improved safety and confidence on technical or high-speed rides.

The SM-MA-R203P/S adapter is designed for simple installation, making it accessible to both professional mechanics and DIY enthusiasts.

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.