Box Two External Bottom Bracket 68/73 Sealed 24 mm blk
Box Two External Bottom Bracket 68/73 Sealed 24 mm blk
Box Two External Bottom Bracket 68/73 Sealed 24 mm blk

Box Two External Bottom Bracket 68/73 Sealed 24 mm blk

JB Importers
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Box Two External Bottom Bracket 68/73: A Superior Cycling Component for Optimal Performance


The Box Two External Bottom Bracket 68/73 is a premium cycling component designed to provide cyclists with an exceptional riding experience. With its innovative design, sealed bearings, and precise construction, this bottom bracket ensures smooth and efficient pedaling for optimal performance. In this article, we will explore the key features and benefits of the Box Two External Bottom Bracket 68/73 and explain why it is a top-notch choice for riders looking to enhance their cycling adventures.

Smooth and Efficient Pedaling:

The Box Two External Bottom Bracket 68/73 offers several features that contribute to its smooth and efficient pedaling capabilities. Let's delve into the notable aspects of this bottom bracket:

  1. Sealed Bearings: The Box Two External Bottom Bracket 68/73 is equipped with sealed bearings, offering a friction-free rotation. These high-quality bearings reduce resistance during pedaling, enhancing your efficiency and power transfer to the drivetrain.

  2. Precise Construction: With its precise design, the Box Two External Bottom Bracket 68/73 ensures a secure and snug fit within the bottom bracket shell. This precision reduces the risk of noise or creaking during rides, providing a quieter and more enjoyable cycling experience.

  3. Compatibility: Designed for frames with a shell width of 68/73mm, this bottom bracket offers broad compatibility with various bicycles. Its 24mm spindle size is also compatible with a wide range of cranksets, making it a versatile choice for cyclists.

  4. Durability: Crafted from durable materials, the Box Two External Bottom Bracket 68/73 is built to withstand the demands of rigorous cycling. Its construction ensures long-lasting performance, allowing you to ride with confidence on various terrains.

Why Choose Box Two External Bottom Bracket 68/73 from Live4Bikes:

Live4Bikes is a reputable online retailer known for providing cyclists with high-quality products and exceptional customer service. Here's why you should consider purchasing your Box Two External Bottom Bracket 68/73 from Live4Bikes:

  1. Genuine Products: Live4Bikes sources its products directly from reputable manufacturers, guaranteeing that you will receive an authentic Box Two External Bottom Bracket 68/73 that meets the highest quality standards.

  2. Extensive Product Selection: Live4Bikes offers a wide range of cycling components and accessories, catering to the diverse needs and preferences of riders.

  3. Competitive Pricing: Live4Bikes strives to offer competitive prices, ensuring that you receive excellent value for your investment.

  4. Outstanding Customer Service: Live4Bikes is committed to providing reliable and customer-centric service. Their knowledgeable team is readily available to assist you with any inquiries or concerns, ensuring a smooth and satisfying shopping experience.


The Box Two External Bottom Bracket 68/73 is a superior cycling component that delivers smooth and efficient pedaling for an enhanced riding experience. When considering your purchase, Live4Bikes stands out as the preferred destination for acquiring this top-quality bottom bracket. With genuine products, an extensive selection, competitive prices, and exceptional customer service, Live4Bikes ensures a seamless and satisfying shopping experience. Upgrade your cycling performance with the Box Two External Bottom Bracket 68/73 from Live4Bikes and elevate your cycling adventures to new heights of excellence.


 How to Find the Correct Size Bottom Bracket for Your Bike

The bottom bracket is a critical component of your bicycle's drivetrain system, connecting the crankset to the frame. Selecting the correct size bottom bracket is essential for maintaining smooth pedaling and maximizing power transfer. In this article, we will guide you through the process of finding the right bottom bracket size for your bike and discuss the various types of bottom brackets commonly used in bicycles.

Understanding Bottom Brackets:
Before diving into the sizing process, let's briefly explore the different types of bottom brackets available. The choice of bottom bracket depends on your bicycle's frame design, crankset compatibility, and personal preferences. Here are a few common types:

1. Threaded Bottom Brackets:
Threaded bottom brackets are the traditional style, consisting of cups that screw into the frame's bottom bracket shell. They are commonly available in two versions: English/BSA (British Standard) and Italian. Threaded bottom brackets require a compatible frame and crankset.

2. Press-Fit Bottom Brackets:
Press-fit bottom brackets have become popular in recent years, particularly in modern carbon frames. Instead of threading, they rely on a tight press fit into the frame's bottom bracket shell. Common press-fit standards include BB86, BB90/92, PF30, and BB30. It's crucial to ensure compatibility between your frame and crankset when choosing a press-fit bottom bracket.

3. External Bottom Brackets:
External bottom brackets, often referred to as outboard bearings, are designed to be used with external bearing cranksets. They consist of two sets of bearings housed in cups that are threaded into the frame. External bottom brackets are available in different standards, such as Shimano Hollowtech II and SRAM GXP.

Finding the Correct Bottom Bracket Size:
To determine the correct bottom bracket size for your bike, follow these steps:

Step 1: Identify the Frame's Bottom Bracket Shell Type:
Check the specifications of your bicycle's frame to determine its bottom bracket shell type. Common types include threaded (English or Italian) or press-fit (BB86, BB90/92, PF30, BB30, etc.). This information is often provided by the manufacturer or can be measured directly.

Step 2: Determine the Axle Diameter:
The axle diameter is another crucial factor in selecting the right bottom bracket. It corresponds to the diameter of the crank spindle that passes through the bottom bracket bearings. Different cranksets have varying axle diameters, such as 24mm, 30mm, or 30/24mm (commonly known as DUB).

Step 3: Consider Compatibility:
Ensure that the bottom bracket you choose is compatible with your frame and crankset. Manufacturers often provide compatibility charts or guidelines to help you make the right selection. If you're uncertain, consult a professional bike shop for assistance.

Step 4: Seek Professional Advice:
If you are unsure about any aspect of selecting a bottom bracket, it's always a good idea to consult a bike shop or a knowledgeable mechanic. They can offer valuable expertise and help you make an informed decision based on your specific bike model and requirements.

Selecting the correct size bottom bracket for your bike is vital for maintaining optimal performance and compatibility between your frame and crankset. Understanding the various bottom bracket types, identifying your frame's specifications, determining the axle diameter, and considering compatibility are essential steps in the selection process. When in doubt, seek guidance from professionals who can provide personalized advice and ensure a smooth and reliable cycling experience. Remember, a well-chosen bottom bracket will contribute to a more enjoyable and efficient ride.

  Types of BB

 There are several types of bottom brackets (not "bottom brakes") used in bicycles. The bottom bracket is the component that connects the bicycle's crankset to the frame and allows it to rotate smoothly. Different types of bottom brackets have been developed over the years, each with its own design and compatibility with specific cranksets and frames.

Here are some common types of bottom brackets:

1. Threaded (BSC/English): This is the traditional type of bottom bracket, where the cups are threaded into the bicycle frame.

2. Press-fit: Press-fit bottom brackets do not have threads and are instead pressed directly into the frame. They are generally found in modern carbon frames and are known by various names like BB86, BB90, BB92, BB30, PF30, etc.

3. Square Taper: Square taper bottom brackets have a square-shaped spindle that fits into square holes in the crankarms. They were popular in the past but are less common in modern bicycles.

4. Octalink: Shimano's Octalink bottom brackets feature eight splines on the crankarm interface, providing a larger contact area for improved power transfer.

5. ISIS Drive: The ISIS Drive system also uses splines but with a 10-spline pattern on the crankarm interface.

6. Hollowtech II: This is a type of bottom bracket system developed by Shimano, where the bearings are housed in outboard cups.

7. BB30/PF30: These bottom brackets have larger-diameter spindles and use press-fit cups. BB30 spindles are 30mm in diameter, while PF30 spindles are 30mm but have a wider shell.

8. BB386EVO: A variant of BB30, BB386EVO bottom brackets have a wider bottom bracket shell and a 30mm spindle.

9. BBright: Developed by Cervelo, this bottom bracket system combines elements of BB30 and PF30.

It's important to note that the bicycle industry is constantly evolving, and new standards and bottom bracket types may have emerged since my last update. Additionally, different bike manufacturers may have their own proprietary bottom bracket systems. Always check the specifications of your specific bicycle model to know which type of bottom bracket it uses and to ensure compatibility with replacement parts or upgrades.