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Do the bearings of a SON dynamo hub need to be maintained?

SON hub dynamos are equipped with grooved ball bearings, sealed on both sides and lubricated for life. They normally operate for tens of thousands of miles without maintenance and do not need to be greased or adjusted. If they are defective, they are replaced by our SON partner.

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Do the bearings of a SON dynamo hub need to be maintained?

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