FSA, or Full Speed Ahead, are a brand who offer a full range of OEM and replacement components for mountain, gravel and road bikes.
Well known for headsets and bottom brackets as well as high quality replacement bearings that you will find fitted to many bikes right out of the factory
FSA produce almost every part you could need to build a bike - cranksets, stems, brakes, wheels etc. When looking for spare parts for your bike FSA are well worth a look
FSA also have a range of goods for e-bikes including purpose made components and even replacement batteries.