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Are you going to replace or maintain the bottom bracket bearings or the bearings in the headset of your bike yourself? Then it is handy to have special tools on hand. Often good for just one task, but completely specialized in it. For example, we have a cup remover with which you can knock the current bottom bracket out of your bike, or a bottom bracket key set if beating the bottom bracket out is not an option. But we also have a handy tool to quickly find the inside diameter of your headset.