1. Bicycle Rims For Sale
  2. sku: 16737618236136983
  3. SHIMANO AR1-1

SHIMANO AR1-1 Bike Chainring Biopace Sg Ultegra Art Cog Gear AR1-2

Ar1-2 Shimano Ar1-1 Vintage Bike Chainring Lot Biopace Sg Ultegra Art Cog Gear

( Brand: Shimano ), ( Manufacturer Part Number: AR1-1 ), ( Part Type: Bike ), ( Compatible Brand: For Shimano ), ( Color: Silver ), ( Compatible Bike Type: Bmx Bike, Bmx Bike Old School, Racing Bike, Road Bike, Touring Bike ), ( Material: Aluminum, Steel ), ( Country Of Origin: Japan )

Review SHIMANO Vintage Bike Chainring Lot Biopace Sg Ultegra Art Cog Gear

The **Shimano AR1-1 Biopace SG Ultegra ART Cog Gear** is a precision-engineered, high-performance chainring designed for cyclists seeking both efficiency and versatility in their riding experience. Crafted from **Shimano s renowned Ultegra ART (Advanced Rotor Technology)** series, this chainring features a **Biopace SG (Super Glide)** profile, which optimizes chain engagement and reduces friction for smoother, more responsive shifting. The **AR1-1** model is a single chainring, offering a compact yet aggressive gearing solution ideal for climbers and riders who prioritize a higher top-end cadence while maintaining strong acceleration out of the saddle. Its **10-speed compatibility** ensures seamless integration with modern drivetrains, delivering consistent power transfer and minimal chain wear.

The **Ultegra ART Cog Gear** technology incorporates a **precision-machined cog design** with optimized tooth geometry, reducing chain noise and improving efficiency by minimizing lateral chain movement. This results in a quieter, more fluid ride, even at high speeds, while the **Biopace SG profile** further enhances chain alignment, reducing the risk of derailments and extending the lifespan of both the chainring and chain. The **AR1-2** counterpart (a slightly larger cog) provides a versatile alternative, allowing riders to fine-tune their gearing for specific terrains whether it s the aggressive climbing of the **AR1-1** or the balanced efficiency of the **AR1-2**.

Built to Shimano s exacting standards, this chainring is **forged from high-grade aluminum**, ensuring durability and resistance to wear under demanding conditions. The **polished finish** not only enhances aesthetics but also contributes to a cleaner, more professional look on the bike. Whether paired with a compact crankset for aggressive climbing or a standard setup for all-around versatility, the **Shimano AR1-1 Biopace SG Ultegra ART Cog Gear** chainring delivers a blend of performance, reliability, and refined engineering making it a standout choice for serious cyclists who demand the best from their drivetrain.

**Pros and Cons of buying a Shimano AR1-1 Bike Chainring (Biopace SG, Ultegra ART, Cog Gear AR1-2)**

### **Pros**

1. **High Performance and Efficiency** The **Biopace SG** profile is optimized for aerodynamics and power transfer, making it ideal for road cycling where efficiency is critical. The **Ultegra ART** (AR1-2) is a premium drivetrain known for smooth shifting, durability, and weight savings, which enhances overall performance.

2. **Lightweight Construction** Shimano s Ultegra components are designed with lightweight materials, reducing rotational mass and improving pedal efficiency. This is particularly beneficial for climbers and sprinters who prioritize speed and agility.

3. **Durability and Reliability** Ultegra drivetrains are built to last, with robust chainrings that resist wear and corrosion, especially when paired with a compatible chain (e.g., Shimano s own chains). The **AR1-2** (Cog Gear) is designed for longevity, reducing the need for frequent replacements.

4. **Compatibility with Modern Systems** The **Biopace SG** chainring is designed to work seamlessly with **Ultegra ART** and other high-end Shimano groupsets, ensuring smooth shifting and optimal performance. It is also backward-compatible with older Shimano chains (though newer chains like **Hyperglide ** offer better efficiency).

5. **Aerodynamic Advantage** The **Biopace SG** profile reduces drag compared to traditional chainrings, which can be beneficial for time trialists or riders who prioritize speed in flat or rolling terrain.

6. **Premium Build Quality** Shimano s Ultegra components are known for their precision engineering, tight tolerances, and high-quality materials, which contribute to a smoother, more enjoyable riding experience.

7. **Resale Value** Ultegra parts hold their value well, making this a smart investment if you plan to upgrade or sell components in the future.

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### **Cons**

1. **Higher Cost** Ultegra components are more expensive than entry-level or mid-range Shimano groupsets (e.g., Sora, 105). If budget is a concern, this may not be the most cost-effective choice, especially for casual riders.

2. **Overkill for Some Riders** If you primarily ride on flat terrain or don t require the highest performance, the marginal gains from Ultegra may not justify the extra cost. A **105 or even Deore** groupset could offer similar reliability at a lower price.

3. **Maintenance Sensitivity** Higher-end drivetrains like Ultegra require slightly more careful maintenance (e.g., chain cleaning, lubrication) to prevent premature wear. Neglecting upkeep can lead to shifting issues or chainring damage.

4. **Limited Weight Savings for Some** While Ultegra is lighter than lower-tier groupsets, the difference may not be noticeable unless you re a competitive racer or a very heavy rider. The weight savings are more meaningful in climbing than in casual riding.

5. **Compatibility with Non-Shimano Parts** If you mix Shimano components with non-Shimano parts (e.g., Campagnolo, SRAM), you may experience shifting inconsistencies or reduced performance. Stick to a fully Shimano system for optimal results.

6. **Potential for Overgripping** Some riders find that Ultegra s tight tolerances can lead to occasional shifting issues if the chain or derailleurs are not perfectly aligned or if the chain is worn. This requires occasional fine-tuning.

7. **Environmental Sensitivity** Ultegra components can be more affected by dirt, moisture, or extreme conditions than lower-tier groupsets. Riders in harsh environments may need to clean and lubricate more frequently.

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### **Conclusion**

The **Shimano AR1-1 Biopace SG chainring paired with Ultegra ART (AR1-2)** is an excellent choice for **serious cyclists, racers, or performance-oriented riders** who demand efficiency, durability, and premium build quality. Its aerodynamic profile, lightweight construction, and smooth shifting make it ideal for those who prioritize speed and precision. However, for **casual riders, budget-conscious cyclists, or those who don t require top-tier performance**, the cost may not be justified, and a **105 or Deore groupset** could offer similar reliability at a fraction of the price.

If you re already invested in a **Shimano Ultegra system** or plan to upgrade your drivetrain, this chainring is a worthwhile addition. For everyone else, weigh the performance gains against your riding needs and budget before making a decision.

### **Recommendation**

- **Buy it if:** You ride competitively, prioritize efficiency, or already own a Shimano Ultegra system. The **Biopace SG** and **Ultegra ART** combination will enhance your power transfer and overall performance.

- **Skip it if:** You re on a tight budget, ride mostly for fitness or leisure, or prefer a more cost-effective groupset like **105 or Deore**. In such cases, focus on maintaining your current setup rather than upgrading to Ultegra.

- **Alternative Consideration:** If you like the **Biopace SG** profile but want a more budget-friendly option, look into **Shimano 105 s Biopace chainrings** (if available) or **SRAM s Force AXS** (if you re open to non-Shimano). However, Ultegra remains the best all-around choice for Shimano enthusiasts.

Details:

Suitable for ART projects or decor, NOT usable riding. Condition: Poor, all chainring are heavily used with significant tooth wear, dirt, and some rust visible.

part #: ar11 price

  • $27.00

specifications ribicycl:

  • brand: Shimano
  • mpn: Ar1-1
  • part type: Bike
  • compatible brand: For Shimano
  • color: Silver
  • compatible bike type: Bmx Bike, Bmx Bike Old School, Racing Bike, Road Bike, Touring Bike
  • material: Aluminum, Steel
  • country of origin: Japan

returns ribicycl:

  • policy: Returns Accepted
  • method: Money back
  • time: 60 Days
  • paid by: Seller

seller ribicycl:

  • # reviews: 1583
  • city: Appleton, Wisconsin
  • rating: 100.0%

general ribicycl:

  • Cycling > Bicycle Components Parts > Chainrings BMX Sprockets
  • condition: For parts or not working

payments ribicycl:

  • wallet: Paypal
  • other
  • credit card: Mastercard

shipping ribicycl:

offer ribicycl:

  • best offers: True
  • sold: 0
  • quantity: 1
  • availability: In Stock
  • started: February 16, 2026
part type: bike, compatible brand: for shimano, compatible bike type: bmx bike, bmx bike old school, racing bike, road bike, touring bike, country of origin: japan,
category: sporting goods > cycling > bicycle components parts > chainrings bmx sprockets, color: silver, material: aluminum, steel, sku: 16737618236136983,
Shimano AR1-1 Is Similar To:
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1 offer $27.00 USD
  • For parts or not working. Offer #1 priced at $27.00 + $9.95 shipping estimate = $36.95* total. Suitable for ART projects or d cor, NOT usable for riding. SUITABLE FOR ART PROJECT Condition: Poor, all chainrings are heavily used with significant tooth wear, dirt, and some rust visible.+$9.95 shipping

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