---
product_id: 5649384
title: "Shimano R203P/S Disc Brake Adaptor"
brand: "shimano"
price: "S$35"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/5649384-shimano-r203p-s-disc-brake-adaptor
store_origin: SG
region: Singapore
---

# Fits 203mm rear rotors Precision aluminum build Optimized for Shimano disc brakes Shimano R203P/S Disc Brake Adaptor

**Brand:** shimano
**Price:** S$35
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Upgrade your stopping power with precision and style!

## Quick Answers

- **What is this?** Shimano R203P/S Disc Brake Adaptor by shimano
- **How much does it cost?** S$35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/5649384-shimano-r203p-s-disc-brake-adaptor)

## Best For

- shimano enthusiasts

## Why This Product

- Trusted shimano brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Efficient:** Minimalist design with a 1.6-ounce weight keeps your bike sleek and responsive.
- • **Lightweight Durability:** Crafted from premium aluminum for strength without the bulk—ride faster, brake smarter.
- • **Seamless Compatibility:** Designed specifically for rear 203mm rotors, ensuring perfect fit and performance.
- • **Effortless Installation:** Engineered for quick, hassle-free mounting to keep you on the trail without delay.
- • **Trusted Shimano Quality:** Backed by Shimano’s legacy and limited warranty for peace of mind on every ride.

## Overview

The Shimano R203P/S Disc Brake Adaptor is a lightweight, aluminum component designed to fit rear 203mm rotors, ensuring seamless compatibility with Shimano disc brake systems. Its compact design and trusted build quality make it an essential upgrade for cyclists seeking reliable, high-performance braking.

## Description

Shimano R203P/S Disc Brake Adaptor

## Features

- Description: Rear 203mm, P/S

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 5.2 x 4.53 x 1.61 inches |
| Package Weight | 0.07 Kilograms |
| Item Dimensions  LxWxH | 6 x 6 x 6 inches |
| Item Weight | 1.6 ounces |
| Brand Name | Shimano |
| Warranty Description | Limited Warranty |
| Model Name | ISMMAR203PSA |
| Color | Rear 203 |
| Material | Aluminum |
| Suggested Users | mens |
| Number of Items | 1 |
| Manufacturer | Shimano |
| Part Number | ISMMAR203PSA |
| Model Year | 2013 |
| Style | Disc Brake Adaptor |
| Included Components | Disc Brake Adaptor |
| Size | IS Frame |
| Sport Type | Cycling |

## Product Details

- **Brand:** Shimano
- **Material:** Aluminum
- **Vehicle Service Type:** Bicycle
- **Manufacturer:** Shimano
- **UPC:** 689228108813
- **Global Trade Identification Number:** 00689228108813

## Images

![Shimano R203P/S Disc Brake Adaptor - Image 1](https://m.media-amazon.com/images/I/41I4uEP7MBL.jpg)

## Questions & Answers

**Q: Can I use this to convert rear from 160mm to 203mm?**
A: This should convert 180mm to 203mm, not 160mm to 203mm. 150mm to 203mm would be a 43mm adapter... am i wrong?

**Q: Does this come with hardware?**
A: Yes, this came with the hardware needed to mount to the bike and caliper.

**Q: I have a 180mm rotor on the back wheel now and would like to upgrade to 203mm, will this adapter work? Thanx**
A: This adapter works great. With the new 203 disk, my Kona ebike conversion stops at any situation with confidence

**Q: Does it come with screws?**
A: thought it comes without screws.

## Frequently Bought Together

- Shimano R203P/S Disc Brake Adaptor
- Shimano F203P/P Disc Brake Adaptor
- Shimano SM-RT66 Deore/SLX Disc Brake Rotor - 6 Bolt - 203mm

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sg/products/5649384-shimano-r203p-s-disc-brake-adaptor](https://www.desertcart.sg/products/5649384-shimano-r203p-s-disc-brake-adaptor)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-02*