iFirst Bottom Bracket Conversion kit American to Euro - Live4Bikes

iFirst Bottom Bracket Conversion kit American to Euro - Live4Bikes

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 iFirst Bottom Bracket Conversion: Seamlessly Adapt Your American one piece to a sealed 3 piece bottom bracket . 

The iFirst Bottom Bracket Conversion Adapter offers a practical solution for adapting your American BMX frame to the BSA (English) bottom bracket system. With its high-quality construction and seamless compatibility, this adapter allows you to use a BSA bottom bracket on your American BMX frame. When considering your purchase, Live4Bikes emerges as the preferred retailer. In this article, we will explore the features of the iFirst Bottom Bracket Conversion Adapter and discuss why Live4Bikes should be your go-to destination for this purchase.

  1. Seamless Conversion:

The iFirst Bottom Bracket Conversion Adapter is designed to bridge the gap between an American BMX frame and a BSA bottom bracket system. By using this adapter, you can easily convert your American BMX frame to accommodate a BSA bottom bracket, providing you with greater flexibility when it comes to choosing compatible cranksets and bottom bracket options.

  1. High-Quality Construction:

Crafted with precision and durability in mind, the iFirst Bottom Bracket Conversion Adapter is made from high-quality materials. This ensures a reliable and sturdy connection between the bottom bracket and the frame, allowing for efficient power transfer and a secure fit.

  1. Compatibility:

The iFirst Bottom Bracket Conversion Adapter is specifically engineered to enable the use of BSA (English) bottom brackets on American BMX frames. It provides a seamless transition, ensuring that your frame and bottom bracket components work together flawlessly, allowing you to enjoy the benefits of a wider range of cranksets and bottom bracket options.

  1. Why Choose Live4Bikes:

When it comes to purchasing the iFirst Bottom Bracket Conversion Adapter, Live4Bikes offers several advantages that make it the preferred retailer:

a. Trusted Retailer: Live4Bikes has established a reputation as a trusted retailer, known for its commitment to quality products and customer satisfaction.

b. Expert Guidance: Live4Bikes boasts a team of knowledgeable staff who can provide expert guidance and support, ensuring that you choose the right adapter for your specific bike and requirements.

c. Competitive Pricing: Live4Bikes offers competitive pricing, delivering excellent value for your investment without compromising on quality.

d. Wide Selection: Live4Bikes offers a diverse range of bike components and accessories, including the iFirst Bottom Bracket Conversion Adapter, catering to various bike models and preferences.

e. Customer Support: Live4Bikes prioritizes customer support, addressing any concerns or queries you may have promptly and professionally.

f. Convenient Services: Live4Bikes provides convenient services such as reliable shipping and prompt delivery, ensuring you receive your adapter in a timely manner.


The iFirst Bottom Bracket Conversion Adapter is an essential component for seamlessly adapting your American BMX frame to the BSA bottom bracket system. With its reliable construction, compatibility, and ease of use, this adapter opens up a wider range of crankset and bottom bracket options for your bike. When considering your purchase, Live4Bikes provides the trust, expertise, competitive pricing, wide selection, and customer support necessary to make your experience seamless and enjoyable. Choose the iFirst Bottom Bracket Conversion Adapter from Live4Bikes and unlock new possibilities for your American BMX frame.


 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.