SHIMANO BB-UN55 Bicycle Bc 689228120266 1.37X24

( Brand: Shimano ), ( Part Type: Bicycle Bc ), ( UPC: 689228120266 )

Review SHIMANO Bicycle Component 68 Bc 1.37x24

Shimano BB-UN55 Bicycle BB (Bottom Bracket) - 68mm, 1.37x24 Thread

Experience a seamless and durable bicycle bottom bracket system with the Shimano BB-UN55. This high-quality component is engineered specifically for your bicycle, ensuring a perfect fit and optimal performance.

The BB-UN55 is designed with a 68mm BSA (British Threaded) shell width, making it suitable for a wide range of bicycle frames. Its 1.37" (34.9mm) outer diameter and 24mm inner diameter are compatible with Shimano and other leading brand cranksets, providing a reliable and secure interface between the bike's frame and the drivetrain.

Shimano's BB-UN55 employs a robust, sealed bearing design that minimizes the ingress of dirt and debris, thereby reducing the risk of contamination and ensuring longer component life. This bottom bracket offers smooth, efficient pedaling and a quiet ride, even under the most demanding conditions.

The BB-UN55 is an excellent choice for riders seeking a durable, reliable, and high-performance bottom bracket solution. Whether you're a dedicated road cyclist, a weekend warrior, or a casual commuter, this Shimano BB-UN55 will deliver the performance and dependability you expect from a leading brand like Shimano.

Upgrade your bicycle's drivetrain with the Shimano BB-UN55, and experience the difference a high-quality bottom bracket can make in your riding experience.

Pros and Cons of Shimano Bicycle BB-UN55 (Shimano 689228120266)

1. **Reliable Brand:** Shimano is a well-known and trusted brand in the cycling industry, known for producing high-quality components.

2. **Compatibility:** This bottom bracket (BB) is specifically designed for Shimano's Hollowtech II crankset and is suitable for 68mm BB shells, making it easy to find compatible parts.

3. **Durable Material:** The Shimano BB-UN55 is made of high-quality materials, such as aluminum and steel, which are known for their durability and resistance to wear and tear.

4. **Sealed Design:** The sealed design of the BB-UN55 helps to keep out debris and moisture, extending its lifespan and reducing the need for maintenance.

1. **Potential Difficulty in Installation:** Some users have reported that installing this BB can be challenging, especially for those without experience.

2. **Price:** Compared to lower-end options, the Shimano BB-UN55 is relatively expensive, which may not be suitable for budget-conscious buyers.

3. **Limited Color Options:** Shimano components are typically available in a limited range of colors, which may not match the aesthetic of some bikes.

The Shimano BB-UN55 (Shimano 689228120266) is a reliable and durable choice for those looking for a high-quality bottom bracket. Its compatibility with Shimano's Hollowtech II crankset and 68mm BB shell makes it a convenient option for many cyclists. However, its potential difficulty in installation, relatively high price, and limited color options are factors that should be considered before making a purchase.

If you're looking for a reliable, durable, and high-performing bottom bracket and are willing to pay a premium for a trusted brand, the Shimano BB-UN55 (Shimano 689228120266) could be an excellent choice. However, if you're on a tight budget or prefer an easier installation process, you may want to consider other options. It's always a good idea to research several options and read customer reviews to find the best fit for your needs.

Details:

The middle sprocket turns freely. Please see photos for actual condition. This item seems to be in working condition.

part #: 689228120266 prices

• $23.99-$50.00

specifications ribicycl:

• brand: Shimano
• part type: Bicycle Bc
• upc: 689228120266

seller ribicycl:

• # reviews: 4134
• rating: 99.5%
• city: Fayetteville, Arkansas

returns ribicycl:

• method: Money back
• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

general ribicycl:

• Cycling > Bicycle Components Parts > Bottom Brackets
• condition: Used

payments ribicycl:

• credit card: Discover
• other
• wallet: Paypal

shipping ribicycl:

• carrier: USPS
• cost: $10.15
• transit: 4-9 Days
• class: Standard
• type: Calculated
• service: USPS Ground Advantage

offer ribicycl:

• started: August 3, 2025
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0

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