
( Brand: Shimano ), ( Manufacturer Part Number: 21877 ), ( Part Type: Derailleur ), ( Compatible Brand: For Shimano ), ( Color: Black ), ( Set Includes: Derailleur, Shifter ), ( Number Of Speeds: 10 Speed ), ( Derailleur Cage Length: Short Cage ), ( UPC: 689228305359 )
The Shimano 21877 ZEE M640 Shadow 10-Speed MTB Rear Derailleur Shifter is a high-performance component designed for serious mountain bikers. This shifter is part of Shimano's ZEE groupset, known for its durability, precision, and reliability in extreme conditions.
The Shimano ZEE M640 Shadow Rear Derailleur Shifter features a robust design with a forged aluminum body that ensures long-lasting performance. The shifter lever is ergonomically shaped for comfortable control, even in challenging terrain. It offers 10-speed shifting, providing a wide range of gear options for tackling various types of trails.
One of the standout features of this shifter is the Shadow technology. This design keeps the derailleur's upper pulley cage close to the chainstay, reducing the risk of damage from trail obstacles. The Shadow Plus design further enhances this, automatically adjusting the derailleur's position for smooth shifting and minimal chain slap.
The Shimano ZEE M640 Shadow Rear Derailleur Shifter is also equipped with I-SPEC EV, a feature that allows adjustments to be made to the shifter and brake lever clamp without the need for additional parts. This simplifies setup and makes it easy to customize the shifter to fit your preferences.
In summary, the Shimano 21877 ZEE M640 Shadow 10-Speed MTB Rear Derailleur Shifter is a high-quality, durable, and versatile component that offers precise shifting, robust construction, and innovative features like Shadow and I-SPEC EV. It's an excellent choice for riders who demand the best in performance and reliability from their mountain bike components.
Pros of Shimano Zee M640 Shadow 10 SPD MTB Rear Derailleur Shifter:1. Reliability: Shimano is a well-known brand in the cycling industry, known for its durability and reliability. The Zee M640 is designed to handle rough mountain terrain and heavy use.
2. Shift Precision: The Shadow design of the derailleur reduces chain slap and chain sway, ensuring precise shifting even in the most challenging conditions.
3. Adjustability: The Zee M640 offers a wide range of adjustability, allowing you to fine-tune the derailleur to perfectly match your bike and riding style.
4. Durable Materials: The shifter is made with high-quality materials, including aluminum and stainless steel, ensuring long-lasting performance.
5. Cost-Effective: Compared to higher-end Shimano derailleurs, the Zee M640 offers excellent performance at a more affordable price point.
Cons of Shimano Zee M640 Shadow 10 SPD MTB Rear Derailleur Shifter:1. Weight: The Zee M640 is heavier than some other options on the market, which may be a concern for weight-conscious riders.
2. Shifting Feel: Some riders may find the shift action on the Zee M640 to be less smooth than higher-end Shimano derailleurs.
3. Complexity: The Zee M640 has a lot of adjustment options, which can be intimidating for some riders.
Ending Conclusion:The Shimano Zee M640 Shadow 10 SPD MTB Rear Derailleur Shifter is a solid choice for riders looking for a durable, reliable, and adjustable derailleur at an affordable price. While it may not offer the same level of smoothness as higher-end Shimano derailleurs, its reliability and performance on the trail make it a strong contender. If weight and shifting feel are not significant concerns for you, the Zee M640 could be a great addition to your mountain bike setup.
Recommendation:If you are in the market for a reliable and adjustable mountain bike rear derailleur shifter and are not too concerned about weight or shifting feel, the Shimano Zee M640 Shadow 10 SPD MTB Rear Derailleur Shifter is a worthwhile consideration. It offers excellent value for its price and is backed by Shimano's reputation for quality and performance.
This was installed and used on two short rides at a local trail. This derailleur is in new condition with only minor scuff from normal chain wear. Worked flawlessly but decided to go a different direction with the bike build. This is the free ride version that can handle up to 36T cassette.
You won't find a better deal on this Zee drive train in the condition. This also comes with a near new shifter both items were originally purchased at the same time just month ago.