Eccentric Bottom Bracket Adapter Set – 46mm & 51.3mm (For Mid-Drive Motors)
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Product Description
Eccentric Bottom Bracket Adapter - 46mm & 51.3mm
Optimize your mid-drive motor conversion with our Eccentric Bottom Bracket Adapters, designed for a precise and secure fit on a wide range of frames. The eccentric shape reduces bottom bracket wall thickness, ensuring your mid-drive motor can slide in without obstruction, which standard adapters may block.
The 46mm Eccentric Adapter fits frames with a 46mm inner diameter (I.D.), such as those that accept PF30 bottom brackets and similar sizes.
The 51.3mm (American/Ashtabula) Eccentric Adapter is perfect for frames originally designed for one-piece cranks, typically with a 51.3mm I.D. bottom bracket shell.
A small amount of thread-lock adhesive or sealant is recommended to prevent rotation. While movement is minimal once the mid-drive is installed, this extra step ensures long-term stability.
Whether you are converting a classic cruiser, BMX, or modern frame with a PF30 bottom bracket, these adapters provide a precise fit, hassle-free installation, and optimal compatibility for your mid-drive setup.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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