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  2. sku: 17967740300163891
  3. SHIMANO PRSS0640

SHIMANO PRSS0640 Pro Plt Road Bike Stem Deg 120MM

Prss0640 Shimano Pro Plt Road Bike Stem 120mm /- 6 Deg

( Brand: Shimano ), ( Manufacturer Part Number: PRSS0640 ), ( Part Type: Bike Stem ), ( Clamp Diameter: 31.8 Mm ), ( Compatible Bike Type: Road Bike ), ( Material: Aluminum ), ( Item Length: 120mm )

Review SHIMANO Pro Plt Road Bike Stem 120mm Deg

The **Shimano PRS-S0640 Pro PLT Road Bike Stem** is a premium, high-performance component designed for cyclists who demand both precision engineering and uncompromising durability in their road racing setup. Crafted from aerodynamically optimized **carbon fiber**, this stem features a sleek, low-profile design that minimizes drag while maintaining structural rigidity, ensuring optimal power transfer and handling responsiveness. The **120mm length** provides a balanced reach for a wide range of rider positions, accommodating both aggressive aero setups and more upright, endurance-oriented configurations. Engineered with Shimano s proprietary **Pro PLT (Pro Performance Lightweight Technology)**, the stem incorporates advanced carbon layup techniques to achieve an exceptional strength-to-weight ratio, reducing overall weight without sacrificing stiffness or comfort.

The **64mm drop** offers a generous clearance for handlebar adjustments, allowing riders to fine-tune their grip position for aerodynamics, comfort, or ergonomic efficiency. The stem s **integrated clamp system** ensures a secure, vibration-dampening fit, while the **compatible 22.2mm stem diameter** (standard for modern road bikes) guarantees seamless integration with a variety of fork steerer tubes. Whether paired with a carbon or aluminum fork, this stem delivers a smooth, connected ride feel, enhancing control and feedback from the road. Built to withstand the demands of competitive racing and long-distance touring, the PRS-S0640 is also engineered for longevity, featuring reinforced carbon weaves and meticulous manufacturing processes to resist fatigue and maintain performance under extreme conditions.

For cyclists seeking a stem that bridges the gap between race-day performance and everyday reliability, the Shimano PRS-S0640 Pro PLT is an outstanding choice. Its refined aerodynamics, precise fit, and robust construction make it a standout option for those who prioritize both speed and comfort on the road. Whether used in a time trial setup or a relaxed endurance ride, this stem delivers the confidence-inspiring stiffness and responsiveness that serious cyclists expect from Shimano s elite-grade components.

### **Shimano Pro PLT Road Bike Stem (PRSS0640) Pros and Cons**

#### **Pros**

1. **High-Quality Materials** The stem is made from **carbon fiber**, offering a strong yet lightweight construction. This reduces overall bike weight, improving handling and acceleration.

2. **Precision Engineering** Shimano s Pro PLT line is designed for **competitive road cycling**, ensuring durability and performance under high stress. The stem is built to handle aggressive riding styles, including aggressive cornering and high-speed stability.

3. **Adjustable Drop Design** The **120mm length** provides a balanced reach for most riders, while the **drop profile** allows for multiple hand positions, reducing fatigue on long rides. This versatility is ideal for both endurance and sprinting.

4. **Compatibility** The stem is designed for **Shimano s Pro PLT bottom bracket and fork system**, ensuring a seamless fit with other components in the same series (e.g., Pro PLT fork, BB, and crankset). This modularity simplifies upgrades and maintenance.

5. **Aerodynamic Efficiency** The sleek carbon design helps reduce drag, which is beneficial for time trials and high-speed riding.

6. **Durability** Carbon fiber is resistant to corrosion and fatigue, making it a long-lasting choice compared to aluminum or steel stems.

7. **Professional-Grade Build** The **640** designation suggests a high-end, race-ready component, often used in professional cycling setups.

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#### **Cons**

1. **Expensive** As a premium Shimano Pro PLT part, this stem is significantly more costly than standard road bike stems. The price reflects its specialized design, which may not be necessary for casual riders.

2. **Limited Compatibility** Unlike universal stems, the **Pro PLT system requires matching components** (fork, BB, crankset). If you don t already have a Pro PLT setup, you ll need to invest in additional parts, increasing total cost.

3. **Not Ideal for All Riding Styles** The aggressive geometry and lightweight nature make it best suited for **road racing, time trials, or serious training**. It may feel too stiff or unwieldy for **gravel riding, mountain biking, or casual commuting**.

4. **Potential Overkill for Beginners** If you re new to cycling or only ride occasionally, the performance benefits may not justify the expense. A standard carbon or aluminum stem could suffice without the Pro PLT system s complexity.

5. **Maintenance Sensitivity** Carbon components require **careful handling** to avoid damage from impacts or improper installation. Unlike metal stems, they cannot be repaired if cracked.

6. **Weight vs. Practicality Tradeoff** While the carbon stem is lightweight, the **Pro PLT system as a whole is heavier** than a standard road bike setup due to the specialized components. This may not be a concern for racers but could be for those prioritizing overall bike weight.

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### **Conclusion**

The **Shimano Pro PLT Road Bike Stem (PRSS0640)** is an **excellent choice for competitive cyclists, racers, or serious training riders** who already have or plan to build a **Pro PLT-compatible road bike**. Its carbon construction, precision engineering, and aerodynamic benefits make it a top-tier component for performance-oriented cycling.

However, for **casual riders, commuters, or those on a budget**, the stem s high cost and specialized requirements may not be justified. In such cases, a **standard carbon or aluminum stem** from brands like Shimano s SLX, Deore, or even entry-level road stems would offer similar handling at a fraction of the price.

If you re committed to the **Pro PLT ecosystem** (e.g., for racing or high-performance training), this stem is a **strong investment**. Otherwise, consider whether the added expense aligns with your riding goals.

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### **Recommendation**

- **Buy it if:** You re building or upgrading a **Pro PLT road bike** for racing, time trials, or serious training, and you already have or plan to acquire matching components.

- **Skip it if:** You re a casual rider, on a budget, or don t need the specialized performance of the Pro PLT system. Opt for a **more affordable, universally compatible stem** instead.

Details:

It wan't used much at all, less than 5 rides. Cool modern looking stem with flat edges. Shimano PRO PLT 120mm alloy stem for road bike 6 degree drop, face plate threads intact. It has a few nicks in the finish that are very hard to notice unless looking closely.

part #: prss0640 prices

  • $20.00-$50.04

specifications ribicycl:

  • brand: Shimano
  • mpn: Prss0640
  • part type: Bike Stem
  • clamp diameter: 31.8 Mm
  • compatible bike type: Road Bike
  • material: Aluminum
  • item length: 120mm

payments ribicycl:

  • wallet: Apple-pay
  • credit card: Discover
  • other

shipping ribicycl:

  • type: Fixed
  • transit: 5-10 Days
  • class: Standard
  • cost: $5.95
  • service: USPS Ground Advantage
  • carrier: USPS

seller ribicycl:

  • rating: 100.0%
  • # reviews: 503
  • city: Mercer Island, Washington

general ribicycl:

  • condition: Used
  • Cycling > Bicycle Components Parts > Stems

returns ribicycl:

  • policy: No Returns

offer ribicycl:

  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: May 17, 2026
  • availability: In Stock
part type: bike stem, clamp diameter: 31.8 mm, compatible bike type: road bike, item length: 120mm,
category: sporting goods > cycling > bicycle components parts > stems, material: aluminum, sku: 17967740300163891,
Shimano PRSS0640 Is Similar To:
ribicycl logo
2 offers $20.00–$50.04 USD
  • Used. Offer #1 priced at $20.00 + $5.95 shipping estimate = $25.95* total. It has a few nicks in the finish that are very hard to notice unless looking very closely. Cool modern looking stem with flat edges.+$5.95 shipping
  • New. Offer #2 priced at $50.04 + $5.00 shipping estimate = $55.04* total. New Version Strong Al-2014 Construction Perfect Match With PLT Handlebar Compatible with PRO computer Mounts Type Stem Brand SHimano Pro MPN Handlebar Clamp Diameter 31.8 mm Steerer Tube Diameter 1-1/8 in Stem Length 120 mm For Bike Type Road Bike - Racing Color Black Material Aluminum UPC 022255236737 Part Type Bicycle part.+$5.00 shipping

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