best live chat

Box - Extremum Bottom Bracket (BMX)

Product Code: box-extrememum-bottom-bracket-bmx
FREE US Shipping when you add this product to your order
Add $599.00 worth of items for FREE International Shipping

Get up to 10% CASH BACK instantly + FAST FREE SHIPPING on eligible items - Click for details


  • Description
  • Reviews
  • Customer Photos

 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