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Box - Extremum Bottom Bracket (BMX)

Product Code: box-extrememum-bottom-bracket-bmx
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 Box - Extremum Bottom Bracket (BMX)

  • The Extremum RacePrep is the first external BB designed for BMX racing and features non-contact, titanium-coated SUS bearings, modified low-friction seats and lighter weight lube
  • The titanium coating results in a low friction coefficient, increased corrosion resistance and smoother rolling bearings
  • The result is a BB with less drag and a level of bearing protection more in line with the needs of BMX racers