Box Two Bottom Bracket Square-Taper Chromoly Size:113mm these are also a requirement

these are also a requirement for USABMX Nationals

With precision sealed bearings and cold-forged

The airflow ports are artfully sculpted to both reduce weight and drag

Additionally included are Lightweight Black Anodized Aluminum Nipples to reduce rotational weight further

Available in 31

Box Two Bottom Bracket Square-Taper Chromoly Size:113mm these are also a requirementBox Two Square Taper Chromoly Bottom Brackets are the best option for young BMX racers and other users of three piece cranks in search of an affordable, high performance square taper bottom bracket. Each bottom bracket is hand assembled with a Chromoly spindle, sealed bearings, forged and CNC machined alloy cups, and a composite center spacer seal.