REVERSE COMPONENTS 40201 Single Rear Derailleur Hanger Mount Kit 13T

( Brand: Reverse Components ), ( Manufacturer Part Number: 40201 ), ( Part Type: Derailleur Hanger Mount Kit ), ( Compatible Brand: For Shimano ), ( Color: Black ), ( Compatible Model: Colab ), ( Set Includes: Derailleur ), ( Material: Aluminum ), ( Mounting Type: Hanger ), ( Number Of Speeds: 1 Speed ), ( Manufacturer Warranty: 1 Month ), ( Compatible Bike Type: Single Speed Bike ), ( Item Weight: Less Than 1000 G ), ( Derailleur Cage Length: Short Cage )

Review REVERSE COMPONENTS Single Speed Kit 13t Rear Derailleur Hanger Mount Black

The **Shimano Reverse 40201 Single Kit 13-Speed Rear Derailleur with Hanger Mount** is a precision-engineered component designed to deliver reliable performance and seamless shifting for modern single-speed or fixed-gear bicycles. This derailleur is part of Shimano s high-quality **Deore** series, offering a robust yet lightweight construction that ensures durability and efficiency for urban commuters, track enthusiasts, and performance-focused riders. The **reverse mount design** allows for easy installation on either side of the frame, providing versatility for riders who prefer a specific chainline or aesthetic preference. The **13-speed compatibility** ensures seamless integration with contemporary drivetrains, accommodating a wide range of gearing options while maintaining smooth operation.

Built with Shimano s signature attention to detail, this derailleur features a **durable steel cage** that resists flex and wear, even under heavy loads, while the **high-strength aluminum pulleys** minimize chain wear and reduce friction for extended longevity. The **hanger mount** simplifies installation by allowing the derailleur to be securely fastened to a rear derailleur hanger, a common setup in single-speed or fixed-gear setups where a traditional derailleur cage isn t required. This design eliminates the need for complex frame modifications, making it an ideal choice for riders upgrading from a fixed setup or those seeking a lightweight alternative to a full derailleur system.

The **adjustable limit screws** provide precise control over chain tension and shifting range, allowing riders to fine-tune performance for optimal gear engagement, whether navigating steep climbs or high-speed descents. Shimano s **reliable shifting mechanism** ensures consistent engagement, reducing the risk of derailments and chain drops, even under aggressive riding conditions. Additionally, the **compact and streamlined profile** of the derailleur minimizes interference with other components, such as disc brakes or mudguards, making it a practical choice for urban and gravel riding scenarios.

Whether used in a **single-speed configuration** for a smooth, direct-drive experience or in a **fixed-gear setup** for precise control, this derailleur delivers the performance and reliability expected from Shimano s Deore lineup. Its **versatile mounting options**, **durable construction**, and **seamless shifting** make it a standout choice for riders seeking a high-performance, low-maintenance solution for their rear drivetrain. Perfect for both new builds and retrofits, the **Shimano Reverse 40201 Single Kit 13-Speed Rear Derailleur with Hanger Mount** combines functionality, durability, and Shimano s engineering excellence into a single, compact package.

The **Shimano Deore SL-M3100 40201 Single Speed Rear Derailleur Hanger Mount** is a specialized component designed for single-speed or fixed-gear bikes. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Compatibility with Single-Speed/Fixed-Gear Systems**

The hanger mount is specifically designed for single-speed or fixed-gear setups, where a traditional derailleur is unnecessary. This makes it ideal for riders who prefer simplicity and direct drivetrain engagement.

2. **Lightweight and Minimalist Design**

Since it eliminates the need for a full derailleur, the system is lighter than a traditional derailleur setup. This can improve pedal efficiency and reduce rotational mass, which is beneficial for performance-oriented riders.

3. **Reduced Maintenance**

Without a derailleur, there are fewer components to adjust, clean, or replace. This simplifies maintenance routines, as riders only need to focus on the chain, cassette (if applicable), and bottom bracket.

4. **Cost-Effective for Single-Speed Use**

While the hanger mount itself is not cheap, it eliminates the need for a full derailleur, cage, and pulleys. For riders who already have a single-speed or fixed-gear bike, this can be a cost-effective upgrade to ensure proper chainline and compatibility with modern drivetrains.

5. **Improved Chainline Consistency**

The hanger mount helps maintain a precise chainline, which is critical for smooth shifting (if using a single-speed freewheel or cassette) and reduces chain wear. This is particularly useful if you re running a modern cassette or freewheel with tighter spacing.

6. **Versatility for Retrofitting**

The Shimano Deore SL-M3100 is compatible with a wide range of single-speed setups, including those using Shimano, SRAM, or other brand components. It can be used to retrofit older bikes or upgrade existing single-speed systems.

7. **Durability**

Shimano components are generally known for their durability and reliability. The hanger mount is built to withstand the stresses of single-speed riding, though it s not designed for heavy-duty or aggressive use (e.g., BMX or extreme terrain).

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### **Cons**

1. **Limited Use Case**

This hanger mount is **only useful for single-speed or fixed-gear bikes**. If you ride a multi-speed bike, this component is irrelevant and will not function as a derailleur. It s a niche product with a very specific application.

2. **No Shifting Capability**

Unlike a traditional derailleur, this hanger mount does not shift gears. It simply provides a mount for a single-speed freewheel or cassette. If you need multiple gears, you ll still require a full derailleur system.

3. **Potential Overkill for Basic Single-Speed Setups**

If you re running a very basic single-speed setup (e.g., a simple freewheel and chain), the cost of this hanger mount may not justify the investment. For casual or budget-conscious riders, a standard freewheel or fixed-gear setup without a dedicated hanger mount might suffice.

4. **Installation Complexity**

Installing a hanger mount requires precise alignment to ensure the chain runs smoothly. Misalignment can cause chain rub, poor shifting (if applicable), or premature wear. This may require additional tools (e.g., chain whip) and careful adjustment.

5. **Compatibility Issues with Non-Shimano Components**

While Shimano s hanger mounts are widely compatible, some aftermarket or non-Shimano single-speed setups (e.g., certain fixed-gear wheels) may not align perfectly. Testing or minor modifications might be needed.

6. **Cost Relative to Alternative Solutions**

For riders who already have a single-speed bike, the cost of this hanger mount ( $20 $30) might seem high compared to the alternative of using a standard freewheel or fixed-gear setup without any specialized mount. However, it can be a worthwhile investment if you re upgrading an older bike or ensuring long-term compatibility.

7. **Not a Drop-In Replacement for Derailleurs**

This is not a derailleur hanger replacement. It s specifically for single-speed/fixed-gear applications. If you re converting a multi-speed bike to single-speed, you ll need to remove the derailleur entirely and install this hanger mount separately.

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### **Conclusion**

The **Shimano Deore SL-M3100 single-speed rear derailleur hanger mount** is a highly specialized but useful component for riders who prioritize single-speed or fixed-gear setups. Its advantages lie in its precision, lightweight design, and reduced maintenance requirements, making it ideal for performance-oriented or retrofitted single-speed bikes. However, its niche application and lack of shifting capability mean it s not suitable for multi-speed setups or casual riders who don t need the added precision.

For riders who already have a single-speed or fixed-gear bike and want to ensure proper chainline, upgrade older components, or retrofit a modern cassette, this hanger mount is a solid choice. For everyone else, it may not offer enough value to justify the cost.

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### **Recommendation**

- You ride a single-speed or fixed-gear bike and want to upgrade to a modern cassette or freewheel.

- You re retrofitting an older bike to single-speed and need precise chainline alignment.

- You prioritize minimal maintenance and lightweight components in your single-speed setup.

- You re using Shimano or compatible components and want to ensure long-term compatibility.

- You ride a multi-speed bike and need a traditional derailleur.

- You re on a tight budget and your current single-speed setup (e.g., a basic freewheel) works fine without it.

- You re not comfortable with installation or adjustment, as misalignment can cause issues.

- You re using non-Shimano components that may not align perfectly with the hanger mount.

For most single-speed riders, this hanger mount is a worthwhile investment if you re serious about optimizing your drivetrain. However, if you re just getting into single-speed riding or don t need the precision it offers, you may find other solutions (like a standard freewheel) sufficient.

Details:

Reverse Components Single Speed Kit 13T Rear Derailleur Hanger Mount Black.

part #: 40201 prices

• $43.97-$90.00

specifications ribicycl:

• brand: Reverse Components
• mpn: 40201
• part type: Derailleur Hanger Mount Kit
• compatible brand: For Shimano
• color: Black
• compatible model: Colab
• set includes: Derailleur
• material: Aluminum
• mounting type: Hanger
• number of speeds: 1 Speed
• manufacturer warranty: 1 Month
• compatible bike type: Single Speed Bike
• item weight: Less Than 1000 G
• derailleur cage length: Short Cage

offer ribicycl:

• availability: In Stock
• best offers: True
• quantity: 1
• sold: 0
• started: June 3, 2026
• options: Ship-to-home

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Rear Derailleurs

returns ribicycl:

• policy: No Returns

seller ribicycl:

• # reviews: 0
• city: Bunnell, Florida
• rating: 0.0%

payments ribicycl:

• credit card: Diners-club
• other
• wallet: Apple-pay
• money order

shipping ribicycl:

• class: Standard
• cost: $5.72
• type: Calculated
• service: USPS Ground Advantage
• transit: 5-10 Days
• carrier: USPS

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