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eBay£15.29Visit shop M-WAVE Carousel Bottom Bracket – BSA 68/73 - 78 mm Threaded | Shimano Hollowtech
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This M-WAVE Carousel Bottom Bracket is designed for cyclists looking to maintain or replace their bicycle's bottom bracket with a durable and adaptable solution. It offers smooth rotation thanks to its sealed bearings and comes with adaptors for different frame widths, providing a key benefit of versatile fit. A potential caveat is that it is not an original spare part for Shimano, meaning compatibility should be double-checked for specific high-performance applications. Key features include a plastic inner casing, 24 mm inner diameter, two sealed bearings, and included adaptor rings for 73-78 mm bottom bracket housing.
| Brand | M-Wave |
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The main advantage is its adaptability, as it can be used with 68mm, 73mm, and 78mm bottom bracket shell widths thanks to the included adaptor rings.
It is compatible with cranksets designed for a 24 mm spindle diameter. It is also noted as compatible with Shimano, though it is not an original spare part.
You can clean the exterior with a damp cloth. Avoid using high-pressure water jets, which can force water past the seals.
BSA refers to the British Standard or 'English' threading for bicycle bottom brackets, which is the most common type.
While functional, it's designed more for general use and maintenance. For professional racing, components specifically engineered for maximum performance and lowest weight might be preferred.
Lifespan varies greatly depending on riding conditions, maintenance, and usage. With proper care, it should provide reliable service for regular cycling.
This may indicate wear in the sealed bearings. Check if the noise persists after cleaning. If so, the bottom bracket may need replacement.
Ensure the bottom bracket cups are properly tightened into the frame. Check that crank arm bolts are also secure.
Ensure the correct adaptor ring is being used for the specific frame shell width (73mm or 78mm). Clean the inside of the bottom bracket shell and the adaptor to ensure a smooth fit.
This often indicates an issue with the crankset's own bearings or installation, rather than the bottom bracket itself. Ensure crank bolts are properly torqued.
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