The SRAM DUB bottom bracket has been created to have a much better seal, last longer, reduce weight and achieve that all bottom bracket systems have the same performance, whatever their size. 28.9 mm in diameter is the measure that SRAM has found ideal to achieve high stiffness and light weight, allowing a better seal of the bearings, which makes it more durable.
The specific DUB bottom bracket bearings are compatible with any frame, with rare exceptions, and are available in 4 versions: BSA (threaded), PressFit, BB30 and PressFit30.
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The SRAM DUB bottom bracket has been created to have a much better seal, last longer, reduce weight and achieve that all bottom bracket systems have the same performance, whatever their size. 28.9 mm in diameter is the measure that SRAM has found ideal to achieve high stiffness and light weight, allowing a better seal of the bearings, which makes it more durable.
The specific DUB bottom bracket bearings are compatible with any frame, with rare exceptions, and are available in 4 versions: BSA (threaded), PressFit, BB30 and PressFit30.
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