1. Bicycle Rims For Sale
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  3. SHIMANO PRO PRHA0585

SHIMANO PRO PRHA0585 Discover Aero Ud Carbon Handlebar 31.8MM 42CM

Prha0585 Shimano Pro Discover Aero Ud Carbon Handlebar Compact 31.8mm X 42cm

( Brand: Shimano Pro ), ( Manufacturer Part Number: PRHA0585 ), ( Handlebar Type: Drop Bar ), ( Clamp Diameter: 31.8 Mm ), ( Color: Black ), ( Compatible Bike Type: Road Bike Racing ), ( Set Includes: Handlebar ), ( Material: Carbon ), ( Part Type: Bicycle Part )

Review SHIMANO PRO Discover Aero Ud Carbon Handlebar Compact 31.8mm 42cm

The **Shimano PRO PRA-H0585 Discover Aero UD Carbon Handlebar** is a premium, performance-oriented component designed for cyclists seeking both aerodynamics and precision in their riding experience. Crafted from high-grade **carbon fiber**, this handlebar delivers an exceptional balance of stiffness, weight savings, and aerodynamic efficiency, making it an ideal choice for road cyclists, triathletes, and competitive riders who demand the utmost in handling and comfort. The **UD (Universal Drop) design** offers a versatile setup, accommodating a wide range of stem lengths and angles to optimize rider positioning, whether for aggressive time-trials, efficient group rides, or long-distance endurance efforts. With a **31.8mm clamp diameter**, it ensures compatibility with a broad spectrum of stems, including Shimano s own high-performance models, as well as third-party options from brands like FSA, Cane Creek, and others, allowing for customizable fit and ergonomic tuning.

The **42cm length** strikes a practical middle ground, catering to riders of average to slightly larger frames while still providing ample reach for those who prefer a more extended position. This dimension minimizes unnecessary bulk without sacrificing stability, ensuring a smooth and responsive interface between rider and bike. The **aero profile** of the handlebar is meticulously engineered to reduce drag, helping cyclists achieve faster speeds with less effort, particularly during high-speed efforts or in windy conditions. The **smooth, contoured shape** not only enhances aerodynamics but also promotes a more natural hand position, reducing fatigue during long rides and minimizing pressure points that can lead to discomfort or numbness.

Underneath its sleek exterior, the carbon construction employs advanced layup techniques to maximize stiffness while keeping weight to a minimum typically around **200 230 grams**, depending on the specific build and any additional features like integrated brake levers or shifter mounts. This rigidity translates to better power transfer and more precise handling, allowing riders to feel subtle changes in terrain or road conditions with greater clarity. The **high-quality finish** ensures durability, resisting wear from frequent use and environmental exposure, while the **ergonomic grip area** provides a secure, non-slip surface for better control, especially in wet or sweaty conditions.

Ideal for riders who prioritize performance without compromising comfort, the Shimano PRO PRA-H0585 Discover Aero UD Carbon Handlebar is a versatile upgrade for both road bikes and triathlon-specific rigs. Whether paired with a compact or extended crankset, it adapts seamlessly to various riding styles, from aggressive climbing positions to relaxed, endurance-focused setups. Its compatibility with Shimano s **Di2 electronic shifting system** further enhances its appeal, offering seamless, precise gear changes that complement the handlebar s aerodynamic and structural advantages. For cyclists who demand nothing less than the best in handling, weight, and efficiency, this handlebar represents a standout choice combining Shimano s reputation for reliability with cutting-edge carbon technology to elevate the riding experience.

The **Shimano Pro PRHA0585 Discover Aero UD Carbon Handlebar** is a high-end aero road handlebar designed for competitive cyclists seeking aerodynamic efficiency and performance. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Aerodynamic Design**

The Aero UD (Ultra Drop) profile significantly reduces wind resistance compared to traditional drop bars. This is particularly beneficial for time trialists, triathletes, and road cyclists looking to minimize drag during high-speed efforts.

2. **Carbon Construction**

The handlebar is made from carbon fiber, which offers a lightweight yet stiff construction. This reduces vibration transmission, improves ride comfort, and enhances power transfer to the wheels.

3. **High-End Shimano Quality**

Shimano is a trusted brand in cycling, and this handlebar is part of their Pro series, which is known for precision engineering, durability, and performance-oriented features. The build quality is generally excellent, with attention to detail in fitment and compatibility.

4. **Wide Reach and Ergonomics**

The 42 cm width provides a broad platform for hand positioning, allowing riders to adopt a more aerodynamic tuck or a more upright position depending on preference. The curved profile also promotes a natural hand and wrist position, reducing strain during long rides.

5. **Compatibility with Aero Components**

The handlebar is designed to work seamlessly with aero road frames, stem, and accessories (e.g., bottle cages, computer mounts). This makes it a versatile choice for riders who already have an aero setup or plan to build one.

6. **Durability**

Carbon handlebars are resistant to corrosion and fatigue, making them a long-term investment. The PRHA0585 is built to withstand the stresses of competitive riding without compromising performance.

7. **Compatibility with Shimano Di2**

If you re using Shimano s electronic shifting system (Di2), this handlebar is designed to accommodate it, providing a seamless integration of electronic controls with the aerodynamic profile.

8. **Adjustable Fit Options**

The 31.8 mm rise allows for slight adjustments in handlebar height, which can be useful for riders who prefer a slightly more aggressive or neutral position. However, this is a fixed feature, so riders with extreme preferences may need to pair it with a compatible stem.

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### **Cons**

1. **High Cost**

As a premium Shimano product, this handlebar is expensive compared to entry-level or mid-range alternatives. The price reflects its advanced materials and aerodynamics, but it may not be justified for casual or recreational riders.

2. **Specialized Fitment Requirements**

The Aero UD profile and width (42 cm) may not suit all riders, particularly those with narrower shoulders or those who prefer a more traditional drop bar setup. Riders with a wider stance or those who prioritize comfort over aerodynamics might find it less ergonomic.

3. **Limited Compatibility with Non-Aero Stems**

While the handlebar itself is versatile, pairing it with a non-aero stem (e.g., a straight bar or a stem with a different rise) can negate some of its aerodynamic benefits. Riders must ensure their stem is compatible with the Aero UD profile.

4. **Weight Considerations**

While carbon is lightweight, the handlebar itself is not extremely heavy (typically around 200 250 grams), but the overall weight of an aero setup including stem, frame, and wheels can add up. For ultra-lightweight riders, this may not be a significant concern, but it s worth noting.

5. **Maintenance Sensitivity**

Carbon components can be more sensitive to impacts or rough handling than aluminum. While durable, they require careful installation and use to avoid micro-fractures or delamination over time.

6. **Learning Curve for Aero Positioning**

Adopting an aerodynamic tuck on this handlebar requires practice, especially for riders transitioning from traditional drop bars. Improper positioning can lead to discomfort, reduced power output, or even injury if the wrists or shoulders are overstressed.

7. **Limited Aftermarket Support**

While Shimano parts are widely available, some aftermarket accessories (e.g., custom grips, ergonomic pads) may not be optimized for the Aero UD profile. Riders may need to invest in specialized aero grips or pads to fully utilize the handlebar s benefits.

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### **Conclusion**

The **Shimano Pro PRHA0585 Discover Aero UD Carbon Handlebar** is an excellent choice for competitive cyclists, triathletes, or road riders who prioritize aerodynamics, lightweight construction, and high-performance fitment. Its carbon build, aerodynamic profile, and Shimano quality make it a standout option for those willing to invest in a premium setup. However, its high cost, specialized fitment requirements, and the need for an aero-compatible stem and frame may not align with every rider s needs or budget.

For **serious endurance athletes, time trialists, or riders committed to an aero road setup**, this handlebar is a worthwhile upgrade that can provide measurable performance benefits. For **recreational riders, gravel cyclists, or those who prefer a more traditional drop bar experience**, the added cost and specialized nature may not justify the purchase.

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### **Recommendation**

- **Buy if:**

- You are a competitive road cyclist, triathlete, or time trialist looking to maximize aerodynamics.

- You already have an aero road frame and stem compatible with the Aero UD profile.

- You prioritize carbon construction for stiffness, weight savings, and vibration dampening.

- You are willing to invest in a high-performance component that will enhance your riding experience.

- **Avoid if:**

- You are a casual or recreational rider who does not need the aerodynamic benefits.

- You prefer a more traditional drop bar setup or have a frame/stem that doesn t support the Aero UD profile.

- Your budget is limited, and you can achieve similar performance with a more affordable alternative (e.g., carbon Aero bars from other brands like FSA, Race Face, or Bontrager).

- You are unsure about adopting an aerodynamic tuck and need a more versatile handlebar.

For riders on a tighter budget but still seeking aero benefits, consider alternatives like the **FSA Barron Aero UD** or **Race Face Airovita**, which offer similar profiles at a lower cost. However, if you are committed to the Shimano ecosystem and want the best of what the brand offers, the PRHA0585 is a top-tier choice.

Details:

Perfect condition. Used for one week and switched to a different size. Shimano PRO DISCOVER AERO UD Carbon Handlebar Compact 31.8mm x 42cm.

part #: prha0585 price

  • $302.34

specifications ribicycl:

  • brand: Shimano Pro
  • mpn: Prha0585
  • handlebar type: Drop Bar
  • clamp diameter: 31.8 Mm
  • color: Black
  • compatible bike type: Road Bike Racing
  • set includes: Handlebar
  • material: Carbon
  • part type: Bicycle Part

general ribicycl:

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

offer ribicycl:

  • started: April 16, 2026
  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • best offers: True

shipping ribicycl:

  • carrier: USPS
  • service: USPS Ground Advantage
  • transit: 4-9 Days
  • cost: $15.00
  • class: Standard
  • type: Fixed

seller ribicycl:

  • # reviews: 5542
  • city: Boulder, Colorado
  • rating: 100.0%

payments ribicycl:

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

returns ribicycl:

  • time: 30 Days
  • policy: Returns Accepted
  • method: Money back
  • paid by: Seller
handlebar type: drop bar, clamp diameter: 31.8 mm, compatible bike type: road bike racing, set includes: handlebar, part type: bicycle part,
category: sporting goods > cycling > bicycle components parts > handlebars, color: black, material: carbon, sku: 17555114345938751,
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